if (Array.isArray(obj)) { copy = [];hash.set(obj, copy);for (let i = 0, len =obj.l...
In JavaScript, an object can be copied in two ways. They are deep copy and shallow copy.Firstly, let’s discuss shallow copy. A shallow copy of an object has properties that point to the same reference as the source object’s properties....
js实现深拷贝(deepClone) 首先我们要实现一个getType函数对元素进行类型判断,直接调用Object.prototype.toString 方法。 functiongetType(obj){letmap={"[object Boolean]":"boolean","[object Number]":"number","[object String]":"string","[object Function]":"function","[object Array]":"array","[object...
deep-copy 是一个深拷贝工具,可对任意数据进行深度拷贝,包括 函数 function、正则 RegExp、Map、Set、Date、Array、URL 等等;支持含循环引用关系的对象的拷贝,并且不会丢失成员的引用关系信息 和 类型信息,支持扩展,可根据数据类型定制拷贝逻辑,也可指定拷贝深度;所以,通过它可实现对任意类型的数据进行任意想要的拷贝...
function deepCopy(obj) { if(typeof obj !== 'object' || obj === null) { return obj; } if(obj instanceof Date) { return new Date(obj.getTime()); } if(obj instanceof Array) { return obj.reduce((arr, item, i) => { arr[i] = deepCopy(item); return arr; }, []); } ...
{ string: 'test', array: ['1'], date: new Date(), object:{c: 2, d:{e: 3}}, function: function(){ return this.date; } }; var copyObj = deepCopy(obj); console.log('object comparison', copyObj === obj); //false console.log('string check', copyObj.string === obj.string...
when src is seq or src is array: dest = src for i in 0..high(src): deepCopyImpl(dest[i], src[i], alreadyCopied) elif src is cstringArray: # Must be nil terminated var L = 0 while src[L] != nil: inc(L) let rawSize = L * sizeof(cstring) dest = cast[cstringArray](...
js data types 基本值数据类型:(栈) 7种基本数据类型 Undefined、Null、Boolean、Number 和 String,Symbol, BigInt; 变量是直接按值存放的; 存放在栈内存中的简单数据段,可以直接访问; 引用数据类型:(堆) Array, Object, Function, Date, Math, RegExp, ... ...
extend = jQuery.fn.extend = function() { var options, name, src, copy, copyIsArray, clo...
const deepCopy = v => // Is it an Array? v instanceof Array ? // If it is, map every value to its copy v.map(deepCopy) : // Otherwise, is it a non-null Object? (typeof v === "object" && v !== null) ? // If it is, create a new Object with copies of its proper...