bbo/count_occurrences.js

bbo is a utility library of zero dependencies for javascript.

'use strict';

/**
 * Counts the occurrences of a value in an array.
 */
var countOccurrences = (arr, val) => {
  return arr.reduce((a, v) => v === val ? a + 1 : a, 0);
};

module.exports = countOccurrences;