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willgm/mostFrequentItemInArray.es6.js

Created November 2, 2016 18:01
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mostFrequentItemInArray.es6.js
function mostFrequentIn(array) {
const score = array.reduce((m, i) => m.set(i, (m.get(i) || 0) + 1), new Map);
return Array.from(score)
.reduce(
(r, [key, val]) => val > r.val ? {key, val} : r,
{key: '', val: 0}
);
}
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