module.exports = function array_diff_ukey(arr1) {
  //  discuss at: https://locutus.io/php/array_diff_ukey/
  // original by: Brett Zamir (https://brett-zamir.me)
  //   example 1: var $array1 = {blue: 1, red: 2, green: 3, purple: 4}
  //   example 1: var $array2 = {green: 5, blue: 6, yellow: 7, cyan: 8}
  //   example 1: array_diff_ukey($array1, $array2, function (key1, key2){ return (key1 === key2 ? 0 : (key1 > key2 ? 1 : -1)); })
  //   returns 1: {red: 2, purple: 4}

  const retArr = {}
  const arglm1 = arguments.length - 1
  // var arglm2 = arglm1 - 1
  let cb = arguments[arglm1]
  let k1 = ''
  let i = 1
  let arr = {}
  let k = ''

  const $global = typeof window !== 'undefined' ? window : global

  cb =
    typeof cb === 'string'
      ? $global[cb]
      : Object.prototype.toString.call(cb) === '[object Array]'
        ? $global[cb[0]][cb[1]]
        : cb

  arr1keys: for (k1 in arr1) {
    for (i = 1; i < arglm1; i++) {
      arr = arguments[i]
      for (k in arr) {
        if (cb(k, k1) === 0) {
          // If it reaches here, it was found in at least one array, so try next value
          continue arr1keys // eslint-disable-line no-labels
        }
      }
      retArr[k1] = arr1[k1]
    }
  }

  return retArr
}