INSTRUCTION stringlengths 25 999 | RESPONSE stringlengths 0 999 | SOURCE stringlengths 16 38 | METADATA dict |
|---|---|---|---|
Simple (?) augmented reality app for iPhone
I need to develop an iOS app that implements this simple (I hope) functionality: fire up camera mode, let the user (who's standing in a well known point in a room) point a marker in a room, then adding some AR info localized within the room.
For instance, I stand at the entr... | ARKit is the one you have to refer. | stackexchange-stackoverflow | {
"answer_score": 0,
"question_score": 1,
"tags": "iphone, augmented reality"
} |
Antonym of hagiography
Is there a one word antonym of "hagiography"? A word which means "a piece of writing that paints a biography in the most negative light possible"? | > hatchet job
is a written attack, often but not exclusively ad hominem, that emphasizes the poor quality of the object of the attack.
> obloquy
is a fancy word for the same.
> calumny
is the same with the expectation of falsehood. They all have the same notion of strong bias by the author that hagiography does. | stackexchange-english | {
"answer_score": 4,
"question_score": 1,
"tags": "single word requests, antonyms"
} |
MongoDB _id beyond 9999999
I have a collection with more then 10M documents. I am trying to get the biggest _id form that Mongo collection with PHP
$cursor = $collection->find(array())->sort(array('_id'=>-1))->limit(1);
foreach ($cursor as $doc)
{
echo $doc['_id'];
}
I am getting... | You don't directly show it, but it appears that your `_id` values are numeric strings, not numbers. Strings sort alphabetically, so `'9999999'` (and even `'9'`) would come before `'10000000'` in your descending sort.
Your best option is probably to update your docs to use a numeric data type for `_id` and then they wi... | stackexchange-stackoverflow | {
"answer_score": 1,
"question_score": 1,
"tags": "mongodb"
} |
How to print first or second word in a string with awk?
So I have a string which consists of two words, where I want to print the two words separately in awk (actually gawk).The string may look like this,
str="ab cd"
So I have searched the web and all I come up with is examples how to parse this fro... | idk what you mean by any of `However, awk does not have this grouping. The problem is that I need to preserve the input, so split(), sub(), ... will not help. It would probaby work with match(), but this is not so pretty.`
The gawk equivalent of the perl code in your question:
my $str="ab cd";
$str =... | stackexchange-stackoverflow | {
"answer_score": 2,
"question_score": 1,
"tags": "awk"
} |
First INSERT, then - if OK - DELETE
This SQL SERVER 2005 statement first deletes 18 record ordering them by `FIELD1 ASC`, then inserts the same 18 records in a clone table:
WITH q AS
(
SELECT TOP 18 *
FROM pippo
ORDER BY FIELD1 ASC /* You may want to add... | declare @some_temp_table table (ID_OL int)
WITH q AS
(
SELECT TOP 18 *
FROM pippo
ORDER BY ID_OL ASC /* You may want to add ORDER BY here */
)
insert into minnie
OUTPUT INSERTED.ID_OL INTO @some_temp_table
select * from q
dele... | stackexchange-stackoverflow | {
"answer_score": 2,
"question_score": 3,
"tags": "sql, sql server 2005"
} |
linear-algebra- basis of $M_{22}$ subspace
$S$ is a two rows and two column matrix where $a_{11} =a, a_{12} = b, a_{21} = c, a_{22} = d$ which is an element of $M_{22}$
I am given $a=b$ and $b+2c=0$
How do I prove that $S$ is a subspace of $M_{22}$, when there is no value of $d$? | $S = \left\\{\begin{pmatrix} -2c & -2c\\\ c & d \end{pmatrix}:c,d \in \mathbb{R}\right\\}$. We have:
$\begin{pmatrix} -2x & -2x \\\ x & y \end{pmatrix} + \begin{pmatrix} -2u & -2u \\\ u & v \end{pmatrix} = \begin{pmatrix} -2(x+u) & -2(x+u) \\\ x+u & y+ v \end{pmatrix} \in S$,
and
$r\begin{pmatrix} -2x & -2x \\\ x ... | stackexchange-math | {
"answer_score": 1,
"question_score": 0,
"tags": "linear algebra"
} |
How to speed-up the time waiting for my unicorn to finish its race?
In "Secret of the Magic Crystals", I try to earn some money by signing my unicorn in races. My problem is I have to wait for 35 seconds for each race, and there is no interactivity during this event. Is there a way to speed things up?
! | Several horses can run at the same time. Plus, you can train a horse while another races. Unfortunately, it is impossible to speed-up the time and would be considered a design flaw. | stackexchange-gaming | {
"answer_score": 0,
"question_score": 1,
"tags": "secret of the magic crystals"
} |
Is there a way to find hotels along a subway/metro line?
Is there a way (app or website) to find hotels along a subway or metro line if I don't really care about which station?
For example, if I need to get to Heathrow airport in London, I would like to find a cheap hotel somewhere along the Piccadilly or Elizabeth li... | I tried a Google search using
* london hotels near a metro station
and got many surprisingly useful _looking_ hits.
Too many to list - here are a few that looked highly apposite.
The search itself here
Hotels near the metro.com ! here
You can select within 250 or 500 metres, and choose one of 12 lines, or a... | stackexchange-travel | {
"answer_score": 6,
"question_score": 11,
"tags": "trains, public transport, hotels"
} |
How to use chrono::microseconds with Pybind11?
The error boils down to this snippet.
#include <chrono>
#include <pybind11/chrono.h>
#include <pybind11/pybind11.h>
namespace chr = std::chrono;
namespace py = pybind11;
struct Time {
chr::microseconds elapsed;
... | Method `def` binds functions. Methods `def_readwrite` and `def_readonly` bind fields.
`Time::elapsed` is a field. That's why `def` cannot be used.
PYBIND11_MODULE(CppModule, m) {
py::class_<Time>(m, "Time")
.def(py::init<const chr::microseconds&>())
.def_readwrite("elapsed... | stackexchange-stackoverflow | {
"answer_score": 0,
"question_score": 0,
"tags": "c++, python 3.x, c++ chrono, pybind11"
} |
If X has a dense subset, does that imply that X is closed?
Assume X has a dense subset Y. Then every point in X is a limit point in Y, and so the union of Y and it's closure contains X. Therefore X must be closed. Is this correct? | No, it is not correct. The interval $]0,1[$ has a dense subset, for instance $]0,1[ \cap \mathbb{Q}$, but is not closed. | stackexchange-math | {
"answer_score": 2,
"question_score": 0,
"tags": "real analysis"
} |
How should text wrap in a code block?
I am working on an application where code will be shown on a mobile device. This gives us a constrained width as horizontal scrolling isn't a desired choice for code with long lines. So we have to force the text to wrap in the code block. We have two options:
**Break word** \- whe... | As a programmer, I prefer the line breaking to happen at the boundaries of words (assuming your assessment that line breaking is needed is correct).
However, I would change the way you break. Instead of continuing at column 0, I think you should continue at the same column as the line you are breaking, and you should... | stackexchange-ux | {
"answer_score": 0,
"question_score": 0,
"tags": "layout, code, text editor, programming, wrapping"
} |
Expand yasnippet only when it's at beginning of the line
How to write snippet condition to expand it only when it's positioned at the beginning of the line? | Say your snippet has the key `mysnippet_`, you can use the following condition:
# condition: (looking-back "^mysnippet_" nil)
Speaking of use cases, it could make sense to have snippets for inserting org-mode headers only available when the cursor is in the first line and column:
# con... | stackexchange-emacs | {
"answer_score": 5,
"question_score": 6,
"tags": "yasnippet"
} |
How do I sqlmock an empty set using golang go-sqlmock
I want to test some SQL like:
select name from user where uid = ?
This is ok, I can mock it like this way:
rows := sqlmock.NewRows([]string{“name"}).AddRow(“info")
did = "1234"
mock.ExpectPrepare(“select name from user ... | rows := sqlmock.NewRows([]string{“name"})
not addRow | stackexchange-stackoverflow | {
"answer_score": 6,
"question_score": 4,
"tags": "mysql"
} |
1 question in Theorem 10 of section Spectral Theory of Hoffman Kunze
I am self studying Linear Algebra from Textbook Hoffman and Kunze and I have a question in Theorem 10 of Chapter 9 .
Adding it's image:
 $\alpha$ = f($c_{j} ... | If $\alpha\in E_jV$, then $\alpha=E_jv$ for some vector $v$. Therefore $$ f(T)\alpha=\sum_if(c_i)E_iE_jv=f(c_j)E_j^2v=f(c_j)\alpha. $$ | stackexchange-math | {
"answer_score": 1,
"question_score": 0,
"tags": "linear algebra, inner products, spectral theory"
} |
Web Services development using C# .NET - Compatibility Check
I would like to get some information on list of points that needs to be taken care of while developing Web Services on .NET platform using WCF to make sure it is compatible with majority of the clients out there (Java, .NET etc...).
Earlier I have seen cases... | My suggestion would be to use WS-I Compliance Test once you build you service.
Check: <
WS-I stands for Web Services Interoperability, if your services pass almost all the tests you can be 100% sure that they work with various clients. | stackexchange-stackoverflow | {
"answer_score": 2,
"question_score": 3,
"tags": "c#, .net, wcf, web services"
} |
How to hide form on submit button in shiny?
I have created one absolutepanel in shiny. I have created on submit button and selectInput pane.
selectInput("Customer", "Customer",groupcustomer),
submitButton("Submit",icon("refresh"))
Above code is in div tag. I want to collapse i.e.... | The following will toggle hiding of the input form when the submit button is pushed:
library(shiny)
library(shinyjs)
ui <- basicPage(
useShinyjs(),
tags$div(id="hideme",
selectInput("Customer", "Customer", c("bill","bob","bozo"))
),
ac... | stackexchange-stackoverflow | {
"answer_score": 1,
"question_score": 0,
"tags": "r, shiny, leaflet"
} |
Is it possible to access freeform programatically?
I'd like to be able create/read boards in the new app freeform which is included with iPadOS and iOS 16.2 for collaboration.
Is this API provided by Apple or a third party tool? | The Freeform app does not provide an AppleScript dictionary, nor any Siri Shortcuts.
Therefore the only programatic control is through UI scripting:
* Automating the User Interface - Mac Automation Scripting Guide
For example, to create a new board from the command-line using applescript UI scripting:
... | stackexchange-apple | {
"answer_score": 2,
"question_score": 3,
"tags": "ios"
} |
retrofit 2.3.0 how to handle nested json?
I am kinda of new to retrofit and i am not sure how to handle a nested json structure like this. if any one can help how to parse this type of structure . i would really i appreciate it . i have been stuck for days
{
"status": "ok",
"totalResults": 20,
... | the < to convert your json to POJO and use that for retrofit 2.3 | stackexchange-stackoverflow | {
"answer_score": 2,
"question_score": 1,
"tags": "java, android, retrofit"
} |
Lebesgue Measure on (a,b) and (a,b]
For an exercise I want to show that $\lambda((a,b))=\lambda((a,b])$ where I write $(a,b) = (a_1,b_1)\times(a_2,b_2)\times\dots\times(a_d,b_d)$ and $\lambda$ is the Lebesgue measure on $\mathscr{B}(\mathbb{R^d})$. I tried using a theorem that we proved earlier.
Let $A_n = (a,b_n]$ wi... | So $(b_{k}-a_{k}-1/n)\rightarrow b_{k}-a_{k}$ as $n\rightarrow\infty$. Apply successively the product rule of limits: $(b_{1}-a_{1}-1/n)(b_{2}-a_{2}-1/n)\rightarrow(b_{1}-a_{1})(b_{2}-a_{2})$, do it in this way up to $d$, we get $(b_{1}-a_{1}-1/n)\cdots(b_{d}-a_{d}-1/n)\rightarrow(b_{1}-a_{1})\cdots(b_{d}-a_{d})$ as $n... | stackexchange-math | {
"answer_score": 2,
"question_score": 0,
"tags": "real analysis, lebesgue measure"
} |
skipping reCaptcha multiple image selections
I have included a google recaptcha in my website. But, I want to skip the multiple image selections . I mean no puzzle should appear to the user. He should be able to directly tick the recaptcha. Is this possible. If so how? Thanks in advance | The ReCaptcha from Google need to use this _puzzle_ to determine whether the user is a robot or not.
If your really want to remove this part you should think about using another CAPTCHA. Find the one that fit your technology.
**_Here_** is a link that provide different other solution. Some of them use the old _number... | stackexchange-stackoverflow | {
"answer_score": 1,
"question_score": 0,
"tags": "javascript, recaptcha"
} |
jQuery doesn't work with elements created after document load
I created two elements dinamically with jQuery:
a picture and a Close button
I wrote the code to remove both in doument.ready function:
$( ".deletepreview" ).click(function() {
code = $(this).data("prevcode");
$('#'+code).remo... | You need to use delegated events via `on()` if you want events to be handled on dynamically added elements:
$(document).on("click", ".deletepreview",function() {
var code = $(this).data("prevcode");
$('#'+code).remove();
$(this).remove();
});
I slightly modified your example: a... | stackexchange-stackoverflow | {
"answer_score": 32,
"question_score": 15,
"tags": "javascript, jquery, html"
} |
¿Cómo puedo probar un servicio en SoapUI que reciba como parámetro un archivo (MultipartFile)?
¿Cómo puedo probar en SoapUI este servicio?
@RequestMapping(value = "/cargarArchivo", method = RequestMethod.POST, consumes = "multipart/form-data")
public void cargarDatos(@RequestParam("file") MultipartFil... | Estos son los pasos a seguir para enviar un archivo a un servicio web con el SoapUI v.5.2.1:
1. Seleccionar POST como método de la petición.
2. Escoger multipart/form-data como Media Type.
3. Clic en la pestaña Attachments.
4. Clic en el símbolo + verde y seleccionar el archivo.
5. Este paso es opcional. Mar... | stackexchange-es_stackoverflow | {
"answer_score": 1,
"question_score": 0,
"tags": "java, spring, soapui"
} |
using copy() and move_uploaded_file() error message: failed to open stream - php
I am using `copy` and `move_uploaded_file()` copy(/tmp/phpJ0lg4r.jpeg) [function.copy]: it gives me the error **failed to open stream: No such file or directory in**
I do not think there is an error in the code, but its the image temp pat... | Try
`move_uploaded_file($_FILES["u"]["tmp_name"], "Path_Of_Directory");` | stackexchange-stackoverflow | {
"answer_score": 1,
"question_score": -1,
"tags": "php"
} |
Why cannot I create a file in a folder I own with chmod 655, but 755 works?
I have a backup folder owned by a system user (mongodb) and chmoded 655. When I try to create files in it, it raises a permission issue:
root@maquina:/var/backups/mongodb# su -s /bin/bash mongodb -c "/usr/bin/touch test.txt"
/... | You need to have execute permissions in the directory in order to do seeks there. Without being able to do a seek, you can't create a file
sudo chmod u+x /var/backups/mogodb | stackexchange-serverfault | {
"answer_score": 4,
"question_score": 1,
"tags": "ubuntu, chmod"
} |
Oracle DB : java.sql.SQLException: Closed Connection
Reasons for java.sql.SQLException: Closed Connection from Oracle??
> java.sql.SQLException: Closed Connection at oracle.jdbc.driver.DatabaseError.throwSqlException(DatabaseError.java:112) at oracle.jdbc.driver.DatabaseError.throwSqlException(DatabaseError.java:146) ... | It means the connection was successfully established at some point, but when you tried to commit right there, the connection was no longer open. The parameters you mentioned sound like connection pool settings. If so, they're unrelated to this problem. The most likely cause is a firewall between you and the database th... | stackexchange-stackoverflow | {
"answer_score": 55,
"question_score": 39,
"tags": "java, sql, jdbc, oracle10g"
} |
Select mysql query between date?
How to select data from mysql table past date to current date? For example, Select data from 1 january 2009 until current date ??
My column "datetime" is in datetime date type. Please help, thanks
Edit:
If let say i want to get day per day data from 1 january 2009, how to write the q... | select * from *table_name* where *datetime_column* between '01/01/2009' and curdate()
or using `>=` and `<=` :
select * from *table_name* where *datetime_column* >= '01/01/2009' and *datetime_column* <= curdate() | stackexchange-stackoverflow | {
"answer_score": 92,
"question_score": 56,
"tags": "mysql, select, date"
} |
Backbone collection's URL depends on initialize function
I have a Backbone collection whose URL depends on the initialize function. When I create an instance of this Backbone collection, I pass in an ID to filter which instances of the model appear. Here is what the collection's code looks like:
var Goa... | You can use a function for `url` that dynamically builds the URL.
url: function() {
return " + this.goal_id + "&format=json";
}, | stackexchange-stackoverflow | {
"answer_score": 4,
"question_score": 0,
"tags": "javascript, backbone.js"
} |
Hitting escape to continue does not work in Suggested Edit Dialog
!Hit esc to continue
As you can see from this image, there is a message:
> This suggestion still needs 2 approve votes from other reviewers. Close this popup ( **or hit Esc** ) to continue.
Emphasis is obviously mine.
However no matter how many times... | Fix is rolling out with build `2015.1.30.3034` on meta and `2015.1.30.2257` on sites.
All it took was the removal of the `.no-esc-remove` class from the popup's lightbox - which actually only started to behave correctly after the batch of fixes concerning the stacking of popups we can have due to the markdown editor ... | stackexchange-meta_stackoverflow | {
"answer_score": 3,
"question_score": 24,
"tags": "bug, status completed, keyboard shortcuts"
} |
do diesel engines have Idle Air Control Valve?
My problem is that sometimes when my Astra G tdi 1.7 2002 is idling (is not in gear) the RPM will go to 5000-6000 with out me stepping on the gas pedal. The engine accelerates on its own while idling. I tried reading online and found a post that this could be because of th... | it turned out that the car was tuned and it had some extra electronic that was connected to the computer and the fuel pump. This wasn't a native part of the car and it was hidden. We founded after expecting the electric installation and searching for problems there. After removing it there are no problems and the car r... | stackexchange-mechanics | {
"answer_score": 3,
"question_score": 2,
"tags": "diesel, opel, astra"
} |
how can I generate Java/JSP forms (to work on database data)?
I'm searching for good tools to build jsp forms for DB transactions (new, edit, delete of records) I want to use the simliest tool available. I don't want to write setters/getters for each single record field and for each single table and for each kind of ac... | Your keyword is CRUD (Create, Read, Update, Delete). Netbeans has a CRUD generator which can autogenerate JPA 2.0 entities and JSF 2.0 CRUD forms based on just a SQL database table.
Or, if you're more from Eclipse (like me), then try the CRUDO plugin (I've never tried it though). | stackexchange-stackoverflow | {
"answer_score": 1,
"question_score": 2,
"tags": "java, jsp, frameworks, jdbc, crud"
} |
Problem with loading huge excel file(100mb) when using read_xlsx. Returns wrongly "TRUE" in some cells
I am working with a huge dataframe and had some problems loading it from the excel file. I could only load it using read_xlsx from the readxl package. However i have now realized that some of the cells contains "TRUE"... | Following this advice solved the problem.
> JasonAizkalns: Hard to tell, but this may be caused from allowing read_xlsx to "guess" the column types. If you know the column type beforehand, it's always best to specify them with the col_types parameter. In this case, it may have guessed that column type was logical when... | stackexchange-stackoverflow | {
"answer_score": 0,
"question_score": 1,
"tags": "r, readxl"
} |
Jech Set Theory: Proof that the separative quotient of a generic set is generic
Jech's Set Theory, 3rd edition, has the following result:
> Lemma 14.13: (i) In the ground model M, let Q be the separative quotient of P and let h map P onto Q such that (14.5) holds. If $G \subset P$ is generic over M then $h(G) \subset ... | To solve this we will prove something stronger:
If $[p] \in h(G) \wedge [p] \le [q] \rightarrow q \in G$ this is stronger than the main statement because this actually implies that every representative of $[q]$ lies in $G$. Now it follows from the definition that $[p] \le [q]$ implies that for all $r$, $r$ is comp... | stackexchange-math | {
"answer_score": 0,
"question_score": 1,
"tags": "set theory, order theory, forcing"
} |
Pipe Command To PowerShell from Shell Script
I have some Windbg script where I can call out to a cmd shell via the .shell command. Now I want to execute some Windbg command and pipe the output to the shell script which should start powershell.exe to process the input data. So far I did fail.
In principle it should be... | You can use the predefined `$input` variable to use the text you echo into powershell. In conjunction with the pipeline, this works perfectly:
echo C:\ | powershell.exe -command "$input | dir"
Edit: You also need to use `echo C:\`. I'm not sure of the reasoning, but simply writing `Get-ChildItem 'C:... | stackexchange-stackoverflow | {
"answer_score": 7,
"question_score": 3,
"tags": "powershell"
} |
Who are all these superheros in Avengers: Endgame poster?
Recently I got my hands on IGN's _Avengers: Endgame_ poster, which they made themselves:
8. Spider-Man
9. Dr. Strange
10. Mantis
11. Star-Lord
12. Drax
13. Wasp | stackexchange-scifi | {
"answer_score": 30,
"question_score": 16,
"tags": "marvel, marvel cinematic universe, character identification, avengers endgame"
} |
Concatenate and flat two nested python list
I have two vectors in the form
a = [[1,2,3],[1,2,3],[1,2,3]]
b = [[5,6,7],[5,6,7],[5,6,7]]
I want the output to be
c = [[1,2,3,5,6,7],[1,2,3,5,6,7],[1,2,3,5,6,7]]
I got this line
c = [[a[i],b[i]] for i in range... | _zip_ and _concatenate_ each pairing:
a = [[1,2,3],[1,2,3],[1,2,3]]
b = [[5,6,7],[5,6,7],[5,6,7]]
print([i + j for i,j in zip(a, b)])
Which would give you:
[[1, 2, 3, 5, 6, 7], [1, 2, 3, 5, 6, 7], [1, 2, 3, 5, 6, 7]]
Or using your own logic:
[a[i] ... | stackexchange-stackoverflow | {
"answer_score": 3,
"question_score": 1,
"tags": "python, list, nested"
} |
PHP function to identify and parse unusual time format?
I'm currently working with weather data feeds to assemble some accurate data. This particular feed is being pulled from Norway and has a format of 2012-01-13T19:00:00. The "T" is what throws me off.
Does anyone know if PHP will recognize this format and/or provid... | Yes, PHP will recognize it, because that's a standardized format.
$timestamp = strtotime('2012-01-13T19:00:00'); | stackexchange-stackoverflow | {
"answer_score": 7,
"question_score": 1,
"tags": "php, strtotime"
} |
Does $\int1+\sin^2x+\sin^4x+\sin^6x+...\text{dx}=\tan{x}$?
I want to find $$\int1+\sin^2x+\sin^4x+\sin^6x +...\text{dx}$$ My method was to interpret the integrand as a geometric series with first term $1$ and common ratio $\sin^2x$. Assuming $\sin x\ne1$, I reasoned the integrand should converge.
So the integrand shou... | HINT: For any nonnegative $a <1$ the sum $1+a+a^2+ \ldots = \frac{1}{1-a}$. So setting $a=\sin^2x$, we note: $1+\sin^2 x+\sin^4 x + \ldots = \frac{1}{1-\sin^2 x} = \sec^2 x = \frac{d(\tan x)}{dx}$.
Can you finish from here.
ETA: Nevermind just reread you already got this. YES you are correct. | stackexchange-math | {
"answer_score": 2,
"question_score": 5,
"tags": "calculus, integration, solution verification, indefinite integrals, trigonometric integrals"
} |
Asp.Net notification application using signalR to send notification to only one client
I am trying to make a notification application using SignalR in which only one specific user gets the notification. How do I do this using SignalR? Or is there another way to make a similar feature with any other technology? | Yes you can. See the link here SignalR wiki - Hub
public class MyHub : Hub
{
public void Send(string data)
{
// Similar to above, the more verbose way
Clients[Context.ConnectionId].addMessage(data);
}
} | stackexchange-stackoverflow | {
"answer_score": 0,
"question_score": 1,
"tags": "asp.net mvc 3, notifications, signalr"
} |
Django dictionary not passed?
Trying to pass python dictionary to my django template. But it seems to not be passed while rendering. I have read documentation and few sites, but can't find solution. It must be simple...
#views.py
def home(request):
context = {}
links = getLinks()
... | The reason is that the template does not know about the name `context`, so in `{% for key, value in context.items %}`, `context.items` does not refer to anything.
That means you need to pass the correct dictionary to the template:
# views.py
def home(request):
data = {}
links = getLin... | stackexchange-stackoverflow | {
"answer_score": 2,
"question_score": 0,
"tags": "python, django, django templates, django views"
} |
Linking javascript file with your jquery in it
There doesnt seem to be a definitive answer anywhere online to this. I understand that you can put:
<script type="text/javascript" src="
<script type="text/javascript">
$(document).ready(function() {
Your code here.....
});
</scr... | Put this code in your `script.js`
$(document).ready(function() {
//Your code here.....
});
and then include your `.js` file like this ( _after jQuery_ ) -
<script type="text/javascript" src="
<script type="text/javascript" src="script.js"></script> | stackexchange-stackoverflow | {
"answer_score": 0,
"question_score": 0,
"tags": "jquery"
} |
Model a function with specific shape
I need a function with a specific shape:
* Quadratic/gaussian concave shape ($-x^2$ like)
* Centered in $\frac{1}{2}$ where it reaches the max value 1
* On `0` and `1` to become null
I first tried using a second-degree polynomial function and I failed.
By repeated tries ... | Well you're almost there. You have your nice function centered on $x=\frac{1}{2}$:
$$f(x)=e^{-(x-\frac{1}{2})^2}$$
Now you can compute $f(0)$ and $f(1)$ which will be equal because $f$ is symmetric around $x=\frac{1}{2}$:
$$\large f(0)=f(1)=e^{-\frac{1}{4}}$$
If you want $f(0)=f(1)=0$ you just have to write:
$$f(x... | stackexchange-math | {
"answer_score": 2,
"question_score": 3,
"tags": "functions, graphing functions"
} |
Get Reference to Currently Displayed Card
Let’s say I have a `JPanel` named `cards` and it has a layout type of `CardLayout`. Each card in the layout is also of class`JPanel`. How do I get a reference to the `JPanel` that’s currently being displayed in the layout?
Thanks. | > How do I get a reference to the JPanel that’s currently being displayed in the layout?
There is nothing in the API that allows you to do this, that I'm aware of. So,I extended the CardLayout to provide this information.
Check out Card Layout Focus for my implementation that allows you to get this information among ... | stackexchange-stackoverflow | {
"answer_score": 2,
"question_score": 0,
"tags": "java, swing, cardlayout"
} |
Python, How to pass function to a class method as argument
I am trying write a signal processing package, and I want to let user creates a custom function without needing to access the class file :
class myclass():
def __init__(self):
self.value = 6
def custom(self, func, **kwa... | You need to pass the class instance into the method too, do this :
class myclass():
def __init__(self):
self.value = 6
def custom(self, func, **kwargs):
func(self, **kwargs) ## added self here
return self
c = myclass()
def add(self, **kwarg... | stackexchange-stackoverflow | {
"answer_score": 9,
"question_score": 7,
"tags": "python"
} |
SendMail using outlook credits Java
I am wondering how to send mail using outlook credits without entering additional details like host, port, username, pass in the java program. I used desktop.mail() but it opens the mailInterface which I doesnt want to. | Using the libraries like
JWS,Jacob | stackexchange-stackoverflow | {
"answer_score": 0,
"question_score": 1,
"tags": "jakarta mail"
} |
Is this a valid haiku?
A friend showed me a website for an artist. There is a page filled with haikus he's written. Can someone verify the validity of the following haiku:
> i don’t really
>
> want to do
>
> that | No. There is a distinct pattern that is required. To wit:
> a Japanese poem of seventeen syllables, in three lines of five, seven, and five, traditionally evoking images of the natural world.
>
> * A poem in English written in the form of a haiku.
>
>
> Oxford Dictionaries
What you presented does not fit the pa... | stackexchange-writers | {
"answer_score": 4,
"question_score": 2,
"tags": "haiku"
} |
Retrieving .txt file contents in Google AppEngine
I'm trying to Upload a text file using :
<input type="file" name="file">
and this file is retrieved using:
class UploadHandler(webapp2.RequestHandler):
def post(self):
file=self.request.POST['file']
self.response.h... | The following seems to work, so there must be something else that is happening (live example):
import webapp2
class MainHandler(webapp2.RequestHandler):
def get(self):
self.response.headers['Content-Type'] = "text/html"
self.response.write('''
<form action="/upload... | stackexchange-stackoverflow | {
"answer_score": 4,
"question_score": 4,
"tags": "python, google app engine, text, blobstore"
} |
1em is not set as 16px
i'm working on a website where the client wants some titles at 0.875em.
I checked online, and the base em unit should be 16px for modern browsers. Well, if I set the text-size to 1em in chrome developer, it's set at 12px instead of 16px.
Tried setting `body{font-size:100%}` at the beginning. No... | That is because Chrome's default font-size is 12px. You should set the body and/or html element's font-size to 16px, like so:
html, body {
font-size: 16px;
}
This is assuming that there's no parent elements that change this font-size though, as em is a relative size to the nearest paren... | stackexchange-stackoverflow | {
"answer_score": 12,
"question_score": 6,
"tags": "css, font size"
} |
Check if the first element of an array is a digit in C
I was making a program to take a list of data and separate it by the "," in the file. However, some items had multiple commas.
Is there any _efficient_ way of checking the first character of an array? For example:
char *array = {'1','A','C','D','5'... | The standard function `isdigit` from `<ctype.h>` could be also efficient:
#include <ctype.h>
if (isdigit((unsigned char)array[0])) someaction(array);
You can also define your own, with just two comparisons:
#if (!defined __STDC_VERSION__) || (__STDC_VERSION__ < 199901L)
# ... | stackexchange-stackoverflow | {
"answer_score": 1,
"question_score": -1,
"tags": "c, arrays, string"
} |
Root directory shows 404 in nginx
I am new to nginx server. I tried to set a new url "/images/" for serving images. I edited the bi.site file in site-enabled folder.
server {
listen *:80;
access_log /var/log/myproject/access_log;
location / {
proxy_pass
... | this:
location /images/ {
root /www/myproject/files_storage;
}
results in /www/myproject/files_storage/images path, it would be obvious if you setup error_log. So use "alias" directive instead of "root"
< | stackexchange-stackoverflow | {
"answer_score": 8,
"question_score": 7,
"tags": "nginx"
} |
Как работать с полем типа Array в Doctrine 2
Имеется , пока пустое, поле в таблице(сущности)
/**
* @var array
*
* @ORM\Column(name="options", type="array", nullable=true, unique=false)
*/
private $options;
/**
* Set options
*
* @param array $options
... | Поля типа `array` Doctrine хранит в базе в виде массива, сконвертированного функцией `serialize()`. Делать выборку по отдельно взятому элементу массива — не самый правильный путь. Но если вам нужно сравнить массивы целиком, то вот:
$arr = array(); // Массив для сравнения
$record = $this
->entity... | stackexchange-ru_stackoverflow | {
"answer_score": 1,
"question_score": 1,
"tags": "php, mysql, массивы, doctrine2"
} |
UNNotification delegate function not being called when clicking on Push Notification
Whenerver I clicked on the push notification its not being called the delegate function and gives a warning as:
Warning: UNUserNotificationCenter delegate received call to -userNotificationCenter:didReceiveNotificationResponse:withCom... | I was using ClaverTap SDK that throws a warning while clicking on notification. It fixed after changing its instance method before assigning Notification delegate function. | stackexchange-stackoverflow | {
"answer_score": 0,
"question_score": -1,
"tags": "ios, swift, push notification, apple push notifications"
} |
Can declarative authorization be used to hide/show certain fields?
I'm trying to figure out the best way to hide certain fields in user profile based on user's preference. So far I'm using a boolean field and an if, then statement.
<% if @user.show_email == 'true' -%>
<%=h @user.email %>
<% else... | Have you considered using a helper function? In your case, I would do something like this on app/helpers/user_helper.rb:
def show_attribute(user, attribute_name)
preference = "show_#{attribute_name}"
if current_user.has_role?(:admin) or
!user.respond_to?(preference) or
... | stackexchange-stackoverflow | {
"answer_score": 1,
"question_score": 0,
"tags": "ruby on rails, authorization"
} |
Help with the Inductive step in mathematical Induction?
I just started working on Induction, and I have one particular problem that I don't understand:
Prove that $1+3+5+...+(2n−1)=n^2$ for any integer $n≥1.$
* $n = 1$ :
$1 = 1^2$
* $n = k$ :
$1+3+5+...+(2k−1)=k^2$
* $n = k+1$ : (this is where I have a prob... | Don't get confused. For example, if I write the expression $2+4+6+\cdots +10$, isn't it the same as $2+4+6+\cdots 8+10$? (the sum of even integers from $2$ to $10$, inclusive). They're just including the second last term, that's all. This will be needed in order to apply the induction hypothesis (from the case $n=k$, y... | stackexchange-math | {
"answer_score": 2,
"question_score": 1,
"tags": "induction"
} |
Issue with modifying array by reference
In PHP, I have the following code (whittled down, to make it easier to read):
class Var {
public $arr;
function __construct($arr) {
$this->arr = $arr;
}
function set($k, $v) {
$this->arr[$k] = $v;
}
}
class ... | You needed to take care of reference on **every** variable re-assignment you have.
So the first place is `__construct(&$arr)`
The second is `$this->arr = &$arr;`
Then it should work.
If you didn't put the `&` in the latter case - it would "make a copy" for the reference you passed in constructor and assign "a copy"... | stackexchange-stackoverflow | {
"answer_score": 4,
"question_score": 2,
"tags": "php, session, reference, pass by reference"
} |
Check if Twitter API is down (or the whole site is down in general)
I am using the Twitter API to display the statuses of a user. However, in some cases (like today), Twitter goes down and takes all the APIs with it. Because of this, my application fails and continuously displays the loading screen.
I was wondering if... | Request ` or `test.json`. Check to make sure you get a 200 http response code.
If you requested XML the response should be:
<ok>true</ok>
The JSON response should be:
"ok" | stackexchange-stackoverflow | {
"answer_score": 6,
"question_score": 2,
"tags": "php, javascript, twitter"
} |
debugging Android UDP listening
I want to get in my `Android` emulator some incoming data sent by remote computer on my local network. So first,
InetAddress[] inetAddress = InetAddress.getAllByName(android_emulator_ip);
s = new DatagramSocket();
s.connect(inetAddress[0], some_udp_port);
I g... | I get it debugged setting a timeout this way
s = new DatagramSocket(some_udp_port);
s.setSoTimeout(3000);
and then this worked
byte[] message = new byte[256];
DatagramPacket p = new DatagramPacket(message,message.length);
try{
s.receive(p);
}
The issue wa... | stackexchange-stackoverflow | {
"answer_score": 0,
"question_score": 0,
"tags": "java, android, sockets, udp"
} |
Javascript Array delete or pop causing race condition with console.log?
On the current Google Chrome (Version 22.0.1229.79, on an iMac with Mountain Lion), the following code
var arr = [1, 3, 5];
console.log(arr);
delete arr[1];
console.log(arr);
console.log(arr.pop());
conso... | It is due to queued up `console.log` processing, so the printing is delayed, and it shows a later version of the object or array: Is Chrome's JavaScript console lazy about evaluating arrays?
My answer there has 5 solutions and `JSON.stringify()` was the best one. | stackexchange-stackoverflow | {
"answer_score": 1,
"question_score": 5,
"tags": "javascript"
} |
How can I find out if boost::any contains a literal string?
I have this code
#include <boost/any.hpp>
std::vector<boost::any> a( {1,2,3,"hello",3.0});
for (int i = 0; i < a.size();i++)
{
if (a[i].type() == typeid(int)) // this works
{
std::cout << "int";
... | > How can I find out if Boost any contains a literal string?
String literals are arrays of `const char`. `boost::any` stores decayed types, so string literal will be a `const char*`.
Note that there is no guarantee for the `const char*` to be a string literal. It can be a pointer to any character, not just the first ... | stackexchange-stackoverflow | {
"answer_score": 3,
"question_score": 0,
"tags": "c++, boost"
} |
Having multi lines in bash command substitution
I have a very long bash command inside a command substitution like following:
$( comaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaand )
I want to know if there is a way to break this command into shorter lines for the sake of readability like following:
... | You can mask the newline with `\`.
$( com\
aaaaaaaaaaaaaa\
aaaaaaaaaaaaaa\
nd )
The `\` tells the shell to ignore the newline. | stackexchange-unix | {
"answer_score": 15,
"question_score": 7,
"tags": "bash, shell script"
} |
Add webapi Header in a DelegatingHandler
I am trying to add a header to the request within a Delegating Handler of a webapi project like this:
protected async override Task<HttpResponseMessage> SendAsync(HttpRequestMessage request, CancellationToken cancellationToken)
{
var corGuid = CommonBa... | I was using the wrong Request Object. The Headers do not show up in the HttpContext.Current.Request but in the base.Request object in the Controller.
Thanks | stackexchange-stackoverflow | {
"answer_score": 0,
"question_score": 0,
"tags": "c#, asp.net web api, asp.net web api2"
} |
How do I show a youtube video on full screen when a link is clicked?
In one of my web app I am showing a youtube videos thumb nails like
<img height="150px" id="youtubeImage" src=" href="">
I am fetching the video id from database. I want to show a full screen if this video while clicking on this l... | Not really a jQuery answer, but this can almost be achieved by using the URL:
>
This will redirect to
>
Which has the video taking up the full browser tab. Not strictly fullscreen as it won't hide the player components but I'm not sure you can do it any other way. | stackexchange-stackoverflow | {
"answer_score": 2,
"question_score": 0,
"tags": "jquery, youtube api"
} |
What are Dangling Images in Docker/How they created/How to remove them
How do dangling images get created? Whenever I tried to create them it is not happening.
I had used the same concept as mentioned in docker docs. If my DockerFile contains `FROM alphine:3.4` then I build the image as `docker build -t image1 .`
Aft... | If you _really_ want to create a dangling image, simply interrupt the build process before it's finished.
Honestly don't understand why you want to though; they are a by-product of a failed build, that's all. | stackexchange-stackoverflow | {
"answer_score": 0,
"question_score": -3,
"tags": "docker, dockerfile"
} |
Detect if Windows Service is running of remote machine
> **Possible Duplicate:**
> Check status of services that run in a remote computer using C#
Is it possible to check if a given windows service is running on a remote machine using C#?
This is assuming that I have the correct login credentials for that machine... | WMI, if you're using C# or VB.Net
Otherwise, "SC" is probably the best tool to use from a command line or .bat file. | stackexchange-stackoverflow | {
"answer_score": 5,
"question_score": 7,
"tags": "windows, service"
} |
Etimología de "piragua"
La palabra "piragua" parece ser de esas cuya etimología parece obvia en un principio: una embarcación, vehículo capaz de navegar por el agua, que contenga la misma palabra "agua" en su nombre no puede ser casualidad. ¿O sí? Resulta que según el diccionario, la palabra _piragua_ se originó en el ... | Según todas las fuentes habituales, _piragua_ viene de _piraua_ , que significa canoa hecha con un tronco ahuecado y es una palabra de la lengua caribe insular o iñeri, "lengua arawak del grupo caribeño hablada en las Antillas Menores y relacionada filogenéticamente con el taíno de las Antillas Mayores" (el caribe prop... | stackexchange-spanish | {
"answer_score": 6,
"question_score": 3,
"tags": "etimología, sustantivos"
} |
Can "mdfind" search for phrases and not just unordered words?
Is there a way to search for an exact phrase using the `mdfind` utility? For example, I created two text documents titled "test1" and "test2". The contents of "test1" are:
> I love Apple
And the contents of "test2" are:
> Apple love I
When I type this in... | You need to escape your quotes like so:
mdfind \"I love Apple\" -onlyin ~/Documents
This results in just the one document being found:
~/Documents/test1.txt
Without escaping them, I don't think the quotes actually get passed to the `mdfind` command, they're just interpreted by yo... | stackexchange-apple | {
"answer_score": 8,
"question_score": 5,
"tags": "terminal, search, spotlight"
} |
Given that $\cos\left(\dfrac{2\pi m}{n}\right) \in \mathbb{Q}$ prove $\cos\left(\dfrac{2\pi}{n}\right) \in \mathbb{Q}$
Given that $\cos\left(\dfrac{2\pi m}{n}\right) \in \mathbb{Q}$, $\gcd(m,n) = 1$, $m \in \mathbb{Z}, \, n \in \mathbb{N}$ prove that $\cos\left(\dfrac{2\pi}{n}\right) \in \mathbb{Q}.$
I know nothing ab... | **HINT:**
* For all $\theta\in\mathbb R, m\in\mathbb N$, $\cos(m\theta)$ can be expressed as a polynomial of $\cos(\theta)$ (with rational coefficients), so if $\cos(\theta)$ is rational, so is $\cos(m\theta)$.
* If $m,n\in\mathbb Z$ and $\gcd(m,n)=1$, there exists $k\in\mathbb N$ such that $mk\equiv 1 \bmod n$.
... | stackexchange-math | {
"answer_score": 7,
"question_score": 4,
"tags": "abstract algebra, trigonometry, rational numbers"
} |
shindig error: At least 1 ModulePrefs is required
I have Shindig 2.0.2 server running. When I'm trying to render the following local gadget spec XML:
<?xml version="1.0" encoding="UTF-8" ?>
<Module>
<ModulePrefs title="Calendar">
<Require feature="opensocial-0.7" />
</ModulePrefs>
... | The problem was that Shindig got the SAML redirection HTML page so it could not be parsed correctly. | stackexchange-stackoverflow | {
"answer_score": 0,
"question_score": 0,
"tags": "opensocial, apache shindig"
} |
Is there any way to persist files for a web application using Amazon AWS without a full VM?
I would like to migrate an web application to Amazon AWS.
The application stores and retrieves small persistent data from a `content/` directory. I tried Amazon Elastic Beanstalk to deploy the application however it does not a... | A good way to persist data in AWS is Elastic File System, you can mount your folder "content". | stackexchange-stackoverflow | {
"answer_score": 1,
"question_score": -1,
"tags": "asp.net, amazon web services, amazon s3, amazon ec2"
} |
rails skip records that are addressed by named scope
I have a scope which uses a where clause to narrow the results down to records where a specific parameter is defined.
In Post.rb
scope :nav, where( "priority IS NOT NULL" )
Im using this scope to populate the site navigation with specific Posts. ... | In Post.rb
scope :nav, ->(not_null = true) { not_null ? where.not(priority: nil) : where(priority: nil) }
In controller:
def index
@posts = Post.order(created: :desc).nav(false)
end
Work in Rails 4. | stackexchange-stackoverflow | {
"answer_score": 1,
"question_score": 0,
"tags": "ruby on rails, scope"
} |
Is it possible to write a getter that takes a parameter?
I've found two very strange pieces of code in PureMVC's documentation:
public function get resultEntry( index:int ) : SearchResultVO
{
return searchResultAC.getItemAt( index ) as SearchResultVO;
}
and bit later:
v... | Normally the only way to achieve this is as follows:
public function getResultEntry( index:int ) : SearchResultVO
{
return searchResultAC.getItemAt( index ) as SearchResultVO;
}
The reason is because **get** is reserved ActionScript keyword. It will in fact expose your function as a ... | stackexchange-stackoverflow | {
"answer_score": 4,
"question_score": 4,
"tags": "actionscript 3, puremvc"
} |
Find the peak values from data
I plot the frequency on x-axis and intensity on y-axis via matplotlib.
import numpy as np
import matplotlib.pyplot as plt
from scipy.signal import argrelmax, argrelmin
data = np.loadtxt('pr736024.dat')
z=np.array(data[:,1])
y = (z-z.min())/(z.max... | This answer is an adaptation of my answer in here.
Here you have a numpythonic solution (which is much better than doing a loop explicitly).
You have to define a threshold where where above this value the maxima are detected, that in your case can be 0.2.
I use the roll function to shift the numbers +1 or -1 in the ... | stackexchange-stackoverflow | {
"answer_score": 1,
"question_score": 1,
"tags": "python, numpy, matplotlib"
} |
How to use jquery to bind ctrl+enter to ajax form submission
The following code will submit an ajax form when the user hits ctrl+enter while in the feedback input area. It works fine - but only once. I need to bind this function to the comment form so it persists and allows multiple submissions. In other words - the fo... | This does it. I need .live to get it to persist for future events. I just got the syntax wrong multiple times.
$('#comment_body').live('keydown', function(e) {
if (e.ctrlKey && e.keyCode === 13) {
$('#comment_submit').trigger('submit');
}
}); | stackexchange-stackoverflow | {
"answer_score": 6,
"question_score": 5,
"tags": "javascript, jquery, ajax, forms"
} |
Testers unable to install application
I've sent my iphone application to my testers and all but one complain that the get error OxE8003FFE when they sync their devices. They are not able to install and run the application. I'm using an ad hoc distribution provisioning profile and all of the testers devices are included... | After some back and forth with DTS I managed to fix this issue.
The problem was that I was compiling for armv7 only which caused the installation to fail on armv6 machines.
Another interesting bit, the default universal project template and iphone projects converted to universal will compile for both architectures by... | stackexchange-stackoverflow | {
"answer_score": 0,
"question_score": 0,
"tags": "iphone, ios provisioning"
} |
Sequencing logic per entity while threading in Biztalk
I have messages that have to be published to a JMS Queue. The messages are identified by an item id and the messages having the same item id should be published in a certain sequence.
I'm considering to use threads and worried that multiple threads would not care ... | You will probably need to enable the **Ordered delivery** on the send port to the JMS Queue and ensure that the messages for that port are published to the message box in the order you want them put onto the queue.
By enabling Ordered delivery you are basically making it into a single thread and that does have some pe... | stackexchange-stackoverflow | {
"answer_score": 0,
"question_score": 1,
"tags": "multithreading, biztalk"
} |
Where can I find a Bluetooth chip capable of shipping in bulk?
Why is it that places like Newegg can sell consumer Bluetooth products for less than $10, but the only Bluetooth modules I can find on Mouser or Digikey cost close to $20?
I am looking for the cheapest way to support bidirectional communication via Bluetoo... | In mass production a BT chip costs less than 75 cents. The problem is none of the vendors will work with you, you need to find a module maker who can support you. In MP (Mass Production) you can reach to 5$ level with module including antenna etc. good luck.
The key vendors to look at are CSR and BRCM (Broadcom). We ... | stackexchange-electronics | {
"answer_score": 2,
"question_score": 0,
"tags": "bluetooth"
} |
DDR3 RAM and speeds
I bought some computer parts to build my first system. The mobo was DOA and I RMAed it. They were supposed to send me a replacement but instead just refunded the money on CC. Um, ok, but I still need a mobo! So I decided I want to get a different mobo instead. I was looking at them and one I'm inter... | FWIW, I have DDR3 1600 which is running just fine at 1333. Including running a full set of memory tests for an extended period (3 or 4 days) when I built the system. | stackexchange-superuser | {
"answer_score": 0,
"question_score": 1,
"tags": "memory, ddr3"
} |
C# selecting an image and drawing it in a panel
I have a simple list of filenames of (supported) images in a listbox. When I select a filename I want to have the image drawn in a panel (like a preview).
How do I access the panel to actually load the image? | Add this to the SelectedIndexChanged event handler of your listbox. You can find this by clicking on your listbox, looking in the properties pane, clicking on the lightning bolt and double clicking the blank space beside `SelectedIndexChanged`:
private void listBox1_SelectedIndexChanged(object sender, Eve... | stackexchange-stackoverflow | {
"answer_score": 2,
"question_score": 0,
"tags": "c#, .net"
} |
Prove sum of $\cos(\pi/11)+\cos(3\pi/11)+...+\cos(9\pi/11)=1/2$ using Euler's formula
Prove that $$\cos(\pi/11)+\cos(3\pi/11)+\cos(5\pi/11)+\cos(7\pi/11)+\cos(9\pi/11)=1/2$$ using Euler's formula.
Everything I tried has failed so far.
Here is one thing I tried, but obviously didn't work. $$\Re e \\{e^{\frac{\pi}{11}i... | HINT:
First of all, $$e^x=1\iff x=2n\pi$$ where $n$ is some integer
$\sum_{r=0}^5\cos\frac{(2r+1)\pi}{11}$ =Re[$\sum_{r=0}^5\left(e^{\frac{\pi i}{11}}\right)^{2r+1}$]
Now $\sum_{r=0}^5\left(e^{\frac{\pi i}{11}}\right)^{2r+1}$ is a Geometric Series | stackexchange-math | {
"answer_score": 0,
"question_score": 1,
"tags": "trigonometry, power series"
} |
Redirect using mod_rewrite issue
I'm trying redirect all requests from `domain.com/sign-up/*`. to domain.com/sign-up/ In addition, I would like to know if my code can be improved, see below.
Options +FollowSymLinks
Options +Indexes
RewriteEngine On
RewriteRule ^sign-up/(.*)\.php$ public/r... | Try this, and let me know if it works. If not, please let me know for which URL it's not working.
<IfModule mod_rewrite.c>
Options +FollowSymLinks
Options +Indexes
RewriteEngine On
RewriteBase /
# sign-up/xxx.php -> public/register.php
RewriteRule ^sign-up/.*\.php$ public/... | stackexchange-stackoverflow | {
"answer_score": 1,
"question_score": -1,
"tags": "apache, mod rewrite"
} |
Arba'a Asar Ushlosh Meyot - mi yodeya?
## Who knows three hundred fourteen?
## ?ארבעה עשר ושלוש מאות - מי יודע
In the spirit of the song "Echad - mi yodeya", please post interesting and significant Jewish facts about the number 314.
Lazy gematria has to be stopped, lest it grow indefinitely.
Check out mi-yodeya-ser... | According to Yalkut:
ר' ינאי אומר לא העבידו המצריים את ישראל אלא שעה אחת מיומו של הקב"ה - שמונים ושש שנה`
So 314, out of the promised 400, Am Yisrael was under the impression of the _Galus_ but not under hard oppression.
(From) | stackexchange-judaism | {
"answer_score": 7,
"question_score": 4,
"tags": "number, mi yodeya series"
} |
Regarding convergence of improper integral to be used in Analytic number theory
I am self studying Tom M Apostol Introduction to Analytic number theory.
> In theorem 4.12 Apostol uses that improper integral $\int_x^{\infty} \frac {1} { t (logt) ^2 } \ , dt $ converges, x>2 .
I tried using comparison test by compari... | The integrand has a simple antiderivative:
$$\int_x^{\infty} \frac{dt}{t (\log{t})^2} = \left [ -\frac1{\log{t}} \right ]_x^{\infty} = \frac1{\log{x}}$$
Note that the integral converges because $\log{t} \to \infty$ as $t \to \infty$. | stackexchange-math | {
"answer_score": 2,
"question_score": 1,
"tags": "number theory, improper integrals, analytic number theory"
} |
Upload File Size Limit: Symfony Admin Generator Module
I have form created by the admin generator in the backend of a website. It allows the upload of a video to the site.
It works fine but strangely, the upload fails for files of 10mb or over. However, I have not set any file limits in my form.
Are there Symfony/PHP... | Even I haven't ever worked with Symfony I expect the problem due to limitations on your Web-Server.
If you have the possibility to edit or add your .htaccess file then the following line of code will probably help you:
php_value upload_max_filesize 100M
the 100M in example is for 100 Megabyte. | stackexchange-stackoverflow | {
"answer_score": 1,
"question_score": 0,
"tags": "php, apache, file, upload, symfony1"
} |
Finding a limit or solving with a limit?
I have a complicated equation that has a lot of terms with squareroots. I am simplifying that complicated function with assumption of that x << y , so that later I can use that solution to solve it for x. Here is how the equation looks like approximately (just for illustration p... | If you want to do this in a mathematically consistent manner you need to specify exactly what is the small parameter that you expand with. It seems from your question that you want to expand assuming the ratio $x/y$ is small. You can do that by defining `ϵ=x/y` and replacing that throughout your expression:
... | stackexchange-mathematica | {
"answer_score": 4,
"question_score": 0,
"tags": "equation solving, calculus and analysis, assumptions"
} |
C# ODP.NET Load file or assembly
I recently started testing on a C# (4.0) app that uses ODP.NET (Oracle.DataAccess 4.112.3)
I set this project to target any platform and publish the app.
When I run the program on the client machine I receive:
Could not load file or assembly 'Oracle.DataAccess, Version=... | > Like I said I've targeted 'Any CPU'
This is likely the problem.
The Oracle.DataAccess has separate versions for 32bit and 64bit systems. If you are developing on a 32bit machine, and then deploying on a 64bit OS, you will receive this message.
You could easily work around this by building your application to targe... | stackexchange-stackoverflow | {
"answer_score": 18,
"question_score": 11,
"tags": "c#, .net, oracle, odp.net"
} |
Casting character varying field into a date
I have two tables,
details
id integer primary key
onsetdate Date
questionnaires
id integer primary key
patient_id integer foreign key
questdate Character Varying
Is it possible to make a SELECT statement that performs a JO... | something like
SELECT...
FROM details d
JOIN quesionnaires q ON d.id=q.id
ORDER BY LEAST (decrypt_me(onsetdate), questdate::DATE)
maybe? i'm not sure about the meaning of 'id', if you want to join by it or something else
By the way, you can leave out the explicit cast, it's in... | stackexchange-stackoverflow | {
"answer_score": 4,
"question_score": 0,
"tags": "postgresql"
} |
Please help me solve this complex integral.
$$\oint_C \frac{\cos(z-a)}{(z-a)}\mathrm{d}z$$
Such that $a\in \Bbb R^2$ and $C$ is a single closed curved defined by $|z-a|=\frac{|a|}{2}$
Here $z=x+iy$ is a complex number. Please solve the above integral. Thanks | Let $$f(z) = \cos(z - a)$$
Then you use the Cauchy Integral Formula:
$$f(z_0) = \frac1{2 \pi i}\oint_C \frac{f(z)}{(z-z_0)}dz$$
Let $z_0 = a$. Therefore this becomes:
$$f(a)=\frac1{2 \pi i}\oint_C \frac{\cos(z-a)}{(z-a)}dz = \cos(a-a) = \cos(0) = 1$$
Rearranging for your integral:
$$\oint_C \frac{\cos(z-a)}{(z-a)... | stackexchange-math | {
"answer_score": -1,
"question_score": 0,
"tags": "integration, complex analysis"
} |
jqGrid HOWTO: Get the value of specific cell upon double click on row
I'd like to be able to double click on any part of a given row and open a new html page (based on specific cell value/content). Basically I have all NY counties, each in one row:
County - City - State
Manhatan - New York - NY
... | Ondoubleclick of a row in grid call a function.
Use the below lone of code to get the selected row id (primary key of row) and then get the row contents using that id and then get the column content using the column name. Once you have the country name, open whatever page you want based on country.
selId... | stackexchange-stackoverflow | {
"answer_score": 1,
"question_score": 0,
"tags": "javascript, jquery, jqgrid"
} |
View Weblogic Logs from Console
We deployed an app in a remote weblogic server. They gave us access to the console of the weblogic. But due to security reasons, we are not allowed to remote connect to the server and view the files.
Question, is there a way from the weblogic console for us to see the logs generated by ... | Yes you can view the Weblogic logs from the console
See the Oracle docs on how to do this. | stackexchange-stackoverflow | {
"answer_score": 3,
"question_score": 3,
"tags": "weblogic11g"
} |
Optional Character in PHP Regular Expression Replace
I have data in this format coming from a database...
BUS 101S Business and Society
or
BUS 101 Business and Society
Notice the optional "S" character (which can be any uppercase character)
I need to replace the "BUS 101S" part ... | Assuming the pattern is 3 uppercase letters, 3 numbers and then an optional uppercase letter, just use a single `preg_match`:
$new = preg_replace('/^[A-Z]{3} \d{3}[A-Z]?/', '', $old);
The `^` will only match at the beginning of a line/string. The `{3}` means "match the preceding token 3 times exactl... | stackexchange-stackoverflow | {
"answer_score": 10,
"question_score": 4,
"tags": "php, regex"
} |
URL CNAME Limitation?
We have a domain CNAME pointing to our Amazon load balancer, however the URL's that Amazon provides are longer than 32 characters and one of our clients DNS providers limits CNAME's to 32 characters.
Aside from moving to a diff DNS, any suggestions to get around this? HTTP redirect not an option ... | I assume this is 1and1? I don't know of any workaround that doesn't involve using a different DNS provider. I don't know of anything in the RFC or related specs that call out a 32 char limit. Have you asked the ISP with the limit why it's 32 chars? | stackexchange-stackoverflow | {
"answer_score": 1,
"question_score": 0,
"tags": "dns, cname, amazon web services"
} |
Iterate the input step over different number of files in Pentaho
I have a `get file names` step with a Regular expression that gets 4 csv files. After that I have a `text file input` step which sets the fields of the csv, and read these files.
Once this step is completed a `Table output` step is executed.
The problem... | Change your current job to a subjob that executes once for each incoming record.
In the new main job you need:
* a transformation that runs Get Filenames linking to Copy Rows to Result
* a Job entry with your current job. Configure it to execute for each row.
In the subjob you have to replace Get Filenames wit... | stackexchange-stackoverflow | {
"answer_score": 1,
"question_score": 0,
"tags": "pentaho, pentaho spoon, pentaho data integration"
} |
In GitAhead, is there a way to delete a remote branch when I already deleted the corresponding local branch?
I've already deleted a local branch without deleting its upstream branch on a GitHub. Is there a way to delete the remote branch in a GitAhead?
In Sourcetree you just right click on the remote branch and choose... | Unfortunately no, GitAhead doesn't have an easy way to push a delete except for the little convenience checkmark when you delete the local branch. You would have to resort to the command line or doing it on your remote host. | stackexchange-stackoverflow | {
"answer_score": 2,
"question_score": 1,
"tags": "gitahead"
} |
Unity generic overload of Resolve
When I look at version 3.0 of `IUnityContainer` it only has:
object Resolve(Type t, string name, params ResolverOverride[] resolverOverrides);
Where do I find the generic version so I can do:
container.Reslove < IDoStuff>()
Latest version on _nug... | `IUnityContainer.Resolve<T>()` is an extension method. Add
using Microsoft.Practices.Unity;
to the source file where you want to call `Resolve<T>()` | stackexchange-stackoverflow | {
"answer_score": 3,
"question_score": 2,
"tags": "c#, .net, dependency injection, unity container"
} |
data structure bind conversion c++
I think this is a classical question but I did not manage to find a clear answer (maybe my keywords are not the good one).
Let's say I have a structure of the form (this is a recurrent situation in my programming practice):
std::vector< pair<unsigned int, double> > pai... | `getMean` should take iterators as inputs to it to be fully general, and you should write a custom iterator that will return `pair.first`. | stackexchange-stackoverflow | {
"answer_score": 1,
"question_score": 2,
"tags": "c++, binding, type conversion"
} |
Conflicting steps on how to solve $x'=Ax$.
I was taught that when we had a 2 dimensional system of the form $$x'=Ax$$
With repeated eigenvalues, I'd need to find an eigenvector, $v_1$ and another vector such that:
$$(A-\lambda I)v_2=v_1$$
The solution would then be given by $x=c_1e^{\lambda t}+c_2e^{\lambda t}(v_1 ... | You get the solution with the $t$ if you have a _defective_ eigenvalue. In general these are eigenvalues whose algebraic multiplicity is strictly larger than their geometric multiplicity. You get that one in particular if you have an eigenvalue with algebraic multiplicity $2$ and geometric multiplicity $1$.
However, i... | stackexchange-math | {
"answer_score": 1,
"question_score": 0,
"tags": "linear algebra, ordinary differential equations"
} |
Regular expression from 00001 to 99999
I'm using regex and I want the number from `00001` to `99999`. It should have 5 digits.
I know I can use `[0-9]{5}`, but then I have the number `00000`, but it should begin at `00001`. | (?!00000)[0-9]{5}
Prefixing `(?!00000)` ensures you don't match it; it's called negative lookahead. Live demo here. | stackexchange-stackoverflow | {
"answer_score": 2,
"question_score": 0,
"tags": "java, regex"
} |
Файлы в python. Количество строк в файле
Значит у меня есть код:
studentsfile = open('dataset_3363_4.txt')
q = 0
for i in studentsfile:
q+=1 #посчитали количество строк в файле
lines = studentsfile.readlines()
for k in range(0,q):
print(lines[k].split(';'))
... | В этой строке вы из файла вычитали все строки из файла и указатель позиции в файле достиг конца:
for i in studentsfile:
Тут вы снова обращаетесь к тому же файловому объекта, чей указатель в конце, поэтому `lines` будет пустым
lines = studentsfile.readlines()
* * *
Решения на мес... | stackexchange-ru_stackoverflow | {
"answer_score": 4,
"question_score": 1,
"tags": "python, файлы"
} |
Does JVM loads all used classes when loading a particular class?
When JVM loads a class A, does it load all of the classes used within A?
And I'm wondering if import declarations are matter somehow to the loading process?
The link to JLS would be appreciated. | Import and class loading are unrelated. The former just saves typing: it allows you to use the short class name rather than the fully-resolved class name in your code.
Classes are loaded by the JVM when they're used for the first time. | stackexchange-stackoverflow | {
"answer_score": 8,
"question_score": 1,
"tags": "java, classloader, jls"
} |
CodeIgniter giving a 404 not found on public server only
**Description**
I have a site "searchnwork.com". It uses CodeIgniter. Every page **except** the home page loads fine.
If you go to searchnwork.com, it shows the CI 404 error page.
If you go to searchnwork.com/index.php/users, it shows the UserSignUpController ... | Case sensitive file names.
On MAMP it doesn't seem to care about capitalization. When I uploaded to an actual linux server, CapitalizedFileNames started to fail, since it only searchs for lowercasefilenames. I guess you should use underscores.
Weird that it only fails for index.php. | stackexchange-stackoverflow | {
"answer_score": 1,
"question_score": 1,
"tags": "codeigniter, codeigniter 2"
} |
Making Ext Js Ext.Tip resizable
I have a UI tip component in my code, I want to make this component resizable
I am currently using Ext Js 3.2 library | You can bind a resizer to it:
var resizer = new Ext.Resizable(tip.id, {
handles: 'all',
pinned: false
});
resizer.on('resize', function() {
tip.syncShadow();
});
Unfortunately, it seems that the tip component has not been developed with arbitrary sizing in mi... | stackexchange-stackoverflow | {
"answer_score": 0,
"question_score": 0,
"tags": "extjs, extjs3"
} |
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