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JS 实现 deepCopy
function getType(obj) {
// 为啥不用typeof? typeof无法区分数组和对象
if(Object.prototype.toString.call(obj) == '[object Object]') {
return 'Object';
}
if(Object.prototype.toString.call(obj) == '[object Array]') {
return 'Array';
}
return 'nomal';
};
function deepCopy(obj) {
if (getType(obj) == 'nomal') {
return obj;
} else {
var newObj = getType(obj) == 'Object' ? {} : [];
for(var key in obj) {
// 为啥要用hasOwnProperty?不需要从对象的原型链上进行复制
if(obj.hasOwnProperty(key)) {
newObj[key] = deepCopy(obj[key]);
}
}
}
return newObj;
}
var object = [
{
title: 'test',
checked: false
}
];
deepCopy(object);