Created
September 8, 2017 18:10
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Check sum of unordered array in JavaScript
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| function checkUnorderedSum(arr, sum) { | |
| let alreadySeen = []; | |
| for (var i = 0; i < arr.length; i++) { | |
| let complement = sum - arr[i]; | |
| if (alreadySeen.indexOf(arr[i]) > -1) { | |
| return true | |
| } | |
| alreadySeen.push(complement); | |
| } | |
| } |
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