module.exports = function array_diff(arr1) {
  //  discuss at: https://locutus.io/php/array_diff/
  // original by: Kevin van Zonneveld (https://kvz.io)
  // improved by: Sanjoy Roy
  //  revised by: Brett Zamir (https://brett-zamir.me)
  //   example 1: array_diff(['Kevin', 'van', 'Zonneveld'], ['van', 'Zonneveld'])
  //   returns 1: {0:'Kevin'}

  const retArr = {}
  const argl = arguments.length
  let k1 = ''
  let i = 1
  let k = ''
  let arr = {}

  arr1keys: for (k1 in arr1) {
    for (i = 1; i < argl; i++) {
      arr = arguments[i]
      for (k in arr) {
        if (arr[k] === arr1[k1]) {
          // 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
}