//数组通过值找键
module.exports.arrayFindKey = function (arr,value) {
  let index = 0;
  for (let i in arr) {
    if (arr[i] == value) {
      index = i;
    }
  }
  return index;
}

module.exports.inArray = function (value,arr) {
  for (let i in arr) {
    if (arr[i] == value) {
      return true;
    }
  }
  return false;
}