var isArray = require('./isArray')
var lastArrayEach = require('../array/lastArrayEach')
var lastObjectEach = require('../object/lastObjectEach')

/**
  * 迭代器,从最后开始迭代
  *
  * @param {Object} obj 对象/数组
  * @param {Function} iterate(item, index, obj) 回调
  * @param {Object} context 上下文
  * @return {Object}
  */
function lastEach (obj, iterate, context) {
  if (obj) {
    return (isArray(obj) ? lastArrayEach : lastObjectEach)(obj, iterate, context)
  }
  return obj
}

module.exports = lastEach