面试之----深拷贝

遍历对象for(var o in Obj)
1、判断是不是原始值 typeOf() object
2、判断数组还是对象 instanceof toString constructor
3、建立相应的数组和对象
递归

obj = {
  a: '1',
  b: {
    c: 2,
    d: [11,2,3,4]
  }
}
obj2 = {}
function deepClone(origin, target) {
  var target = target || {},
      toStr = Object.prototype.toString,
      arraStr = "[object Array]";

  for (var prop in origin) {
    if (origin.hasOwnProperty(prop)) {
      if (typeof(origin[prop]) == 'object') {
        if (toStr.call(origin[prop]) == arraStr) {
          target[prop] = []
        } else {
          target[prop] = {}
        }
        deepClone(origin[prop], target[prop])
      } else {
        target[prop] = origin[prop]
      }
    }
  }
}

deepClone(obj, obj2)