module.exports = function count(mixedVar, mode) {
  //  discuss at: https://locutus.io/php/count/
  // original by: Kevin van Zonneveld (https://kvz.io)
  //    input by: Waldo Malqui Silva (https://waldo.malqui.info)
  //    input by: merabi
  // bugfixed by: Soren Hansen
  // bugfixed by: Olivier Louvignes (https://mg-crea.com/)
  // improved by: Brett Zamir (https://brett-zamir.me)
  //   example 1: count([[0,0],[0,-4]], 'COUNT_RECURSIVE')
  //   returns 1: 6
  //   example 2: count({'one' : [1,2,3,4,5]}, 'COUNT_RECURSIVE')
  //   returns 2: 6

  let key
  let cnt = 0

  if (mixedVar === null || typeof mixedVar === 'undefined') {
    return 0
  } else if (mixedVar.constructor !== Array && mixedVar.constructor !== Object) {
    return 1
  }

  if (mode === 'COUNT_RECURSIVE') {
    mode = 1
  }
  if (mode !== 1) {
    mode = 0
  }

  for (key in mixedVar) {
    if (mixedVar.hasOwnProperty(key)) {
      cnt++
      if (
        mode === 1 &&
        mixedVar[key] &&
        (mixedVar[key].constructor === Array || mixedVar[key].constructor === Object)
      ) {
        cnt += count(mixedVar[key], 1)
      }
    }
  }

  return cnt
}