13 lines
287 B
JavaScript
13 lines
287 B
JavaScript
// https://www.codewars.com/kata/sum-of-pairs/train/javascript
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const sum_pairs = (arr, sum) => {
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const map = new WeakMap();
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for (let i = 0; i < arr.length; ++i) {
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if (map[arr[i]]) {
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return [sum - arr[i], arr[i]];
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}
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map[sum - arr[i]] = true;
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}
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return [][0];
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};
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