标签：cti 遍历数组 code func pcl date 输出 for col
1.先进行 类型判断
if(obj==null) return obj; if(obj instanceof RegExp) return new RegExp(obj); if(obj instanceof Date) return new Date(obj); //... if(typeof obj !== ‘object‘) return obj;
2. 判断是 数组还是 对象
let instance = new obj.constructor;
demo
function deepClone(obj,hash=new WeakMap()) { if(obj==null) return obj; if(obj instanceof RegExp) return new RegExp(obj); if(obj instanceof Date) return new Date(obj); //... if(typeof obj !== ‘object‘) return obj; let instance = new obj.constructor; // if(hash.has(obj)) return hash.get(obj); // hash.set(obj,instance); // for (const key in obj) { // if (obj.hasOwnProperty(key)) { // instance[key] =deepClone(obj[key],hash); // } // } return instance; } console.log(deepClone({a:1,b:2,c:{c:1}})); console.log(deepClone([1,2,3,4]));
输出 ：
for (const key in obj) { if (obj.hasOwnProperty(key)) { instance[key] =deepClone(obj[key],hash); } }
5.
if(hash.has(obj)) return hash.get(obj); hash.set(obj,instance);
这里是先判断 是否有被拷贝了 如果被拷贝了 就返回 它
设置映射
function deepClone(obj,hash=new WeakMap()) { if(obj==null) return obj; if(obj instanceof RegExp) return new RegExp(obj); if(obj instanceof Date) return new Date(obj); //... if(typeof obj !== ‘object‘) return obj; let instance = new obj.constructor; if(hash.has(obj)) return hash.get(obj); hash.set(obj,instance); for (const key in obj) { if (obj.hasOwnProperty(key)) { instance[key] =deepClone(obj[key],hash); } } return instance; } console.log(deepClone({a:1,b:2,c:{c:1}})); console.log(deepClone([1,2,3,4]));
输出 ：
标签：cti 遍历数组 code func pcl date 输出 for col
原文地址：https://www.cnblogs.com/guangzhou11/p/11328261.html
