How to sort an array of integers correctly

By default, the sort method sorts elements alphabetically. To sort numerically just add a new method which handles numeric sorts (sortNumber, shown below) –

var numArray = [140000, 104, 99];
numArray.sort(function(a, b) {
  return a - b;



Mozilla Array.prototype.sort() recommends this compare function for arrays that don’t contain Infinity or NaN. (Because Infinity - Infinity is NaN, not 0).

Also examples of sorting objects by key.

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