@modern-kit/utils/dist/array/countBy/index.cjs

modern-kit/utils

'use strict';

var commonIdentity = require('../../common/identity/index.cjs');

function countBy(arr, iteratee) {
  const iterateeToUse = iteratee ?? commonIdentity.identity;
  const result = {};
  for (let i = 0; i < arr.length; i++) {
    const value = arr[i];
    const key = iterateeToUse(value);
    result[key] = (result[key] || 0) + 1;
  }
  return result;
}

exports.countBy = countBy;
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