old_contents: function forEach (arr, fn, thisObj) {
    if (arr == null) return
    var i = -1
    var len = arr.length
    while (++i < len) {
      if (fn.call(thisObj, arr[i], i, arr) === false) break
    }
  }
  
  module.exports = forEach
  
new_contents: function forEach (arr, fn) {
    if (arr == null) return
  
    var i = -1
    var len = arr.length
  
    while (++i < len) {
      if (fn(arr[i], i, arr) === false) break
    }
  }
  
  module.exports = forEach
  
subject: update array/forEach.js