const formatTime = date => {
  const year = date.getFullYear()
  const month = date.getMonth() + 1
  const day = date.getDate()
  const hour = date.getHours()
  const minute = date.getMinutes()
  const second = date.getSeconds()

  return `${[year, month, day].map(formatNumber).join('/')} ${[hour, minute, second].map(formatNumber).join(':')}`
}

const formatNumber = n => {
  n = n.toString()
  return n[1] ? n : `0${n}`
}

// 通过字面量方式实现的函数each
const each =  function(object, callback){
    var type = (function(){
            switch (object.constructor){
              case Object:
                  return 'Object';
                  break;
              case Array:
                  return 'Array';
                  break;
              default:
                  return 'null';
                  break;
          }
      })();
      // 为数组或类数组时, 返回: index, value
      if(type === 'Array' || type === 'NodeList'){
          // 由于存在类数组NodeList, 所以不能直接调用every方法
          [].every.call(object, function(v, i){
              return callback.call(v, i, v) === false ? false : true;
          });
      }
      // 为对象格式时,返回:key, value
      else if(type === 'Object'){
          for(var i in object){
              if(callback.call(object[i], i, object[i]) === false){
                  break;
              }
          }
      }
  }
module.exports = {
  formatTime,
  each
}