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nickcherry/lonely.js

Created March 23, 2018 16:37
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Lonely Integer
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lonely.js
function lonelyInteger(arr) {
return arr.reduce((acc, n) => acc ^ n);
}
const arr = [1, 4, 1, 2, 3, 4, 3];
console.log(lonelyInteger(arr));
// 2
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