new_contents: import random
  
  data = range(10)
  random.shuffle(data)
  
  ''' map vs without map'''
  data1 = [x*x for x in data]
  data2 = map(lambda x: x*x, data )
  
  ''' filter vs without filter '''
  data3 = filter(lambda x: x%2 != 0, data)
  data4 = []
  for x in data:
  	if x%2 != 0:
  		data4.append(x)
  
  ''' reduce vs without reduce '''
  data5 = reduce(lambda x, y: x + y, data)
  data6 = 0
  for x in data:
  	data6 += x
  
subject: Add map, reduce, filter, lambda example