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Sep 25th, 2016
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  1. var array = [1, 2, 3, 'a', 'b', 7, 8, 'f']
  2. for(var i = 0, len = array.length; i < len; i++) {
  3.     if(typeof array[i] == 'number') {
  4.         array[i] *= 2
  5.     } else if(typeof array[i] == 'string') {
  6.         array[i] += array[i]
  7.     }
  8. }
  9. console.log(array)
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