console.log(originalCounter.count)//5console.log(copiedCounter.count)//5copiedCounter.count = 7console.log(originalCounter.count)//5console.log(copiedCounter.count)//7 如果实例中有其它对象的引用,就要在copy方法中使用 JSON.stringify 和 JSON.parse 。 除此之外,深拷贝方法还有jQuery.extend()和lodash....
深浅拷贝,只针对复杂数据类型来说的。 浅拷贝ShallowCopy,是一个对象的逐位副本。创建一个新对象,该对象具有原始对象中的精确副本。如果对象的任何字段是对其他对象的引用,则只复制引用地址,即只复制内存地址,而不复制对象本身,新旧对象还是共享同一块堆内存。改变其中一个对象,另一个也会受影响。如果有修改,会失去...
}// Handle case when target is a string or something (possible in deep copy)// 当目标是字符串或其他的时候(在深度拷贝中可能用到)处理用例// 当目标非对象并且是非函数的时候处理方式if(typeoftarget !=="object"&& !jQuery.isFunction( target ) ) { target = {}; }// Extend jQuery itself if...
return Object.prototype.toString.call(arg) === '[object Object]' } const everyArray = (arr) => { let newArr = [] for (let i = 0; i < arr.length; i++) { if (isObject(arr[i])) { newArr[i] = everyObject(arr[i]) } else if (isArray(arr[i])) { newArr[i] = every...
代码语言:javascript 复制 拷贝map 代码语言:javascript 复制 a:=make(map[string]int)a["k1"]=1a["k2"]=2a["k3"]=3dst:=deepcopy.Copy(a)a1:=dst.(map[string]int)a1["k1"]=10fmt.Println(a,a1)//a:map[k1:1 k2:2 k3:3] a1:map[k1:10 k2:2 k3:3] ...
JavaScript Copy, DeepCopy 今天写点简单的, 但是也算是必考的 Question: Write a JavaScript function Copy Object. Answer: Shallow Copy let obj = { a: 2, } let objCopy = Object.assign({}, obj); Deep Copy JSON.parseandJSON.stringify不能复制function...
hasOwnProperty(prop)) { copy[prop] = deepClone(target[prop]); } } return copy; } 解决循环引用 let obj = { val: 2}; obj.target = obj; deepClone(obj); // 报错: RangeError: Maximum call stack size exceeded 思路:创建一个 Map ,记录已经被拷贝的对象,遇到已经拷贝的对象,直接返回。
Stringdeep copy Float32Arraydeep copy Float64Arraydeep copy Int16Arraydeep copy Int32Arraydeep copy Int8Arraydeep copy Uint16Arraydeep copy Uint32Arraydeep copy Uint8Arraydeep copy Uint8ClampedArraydeep copy booleandeep copy nulldeep copy
A way to create a shallow copy in JavaScript using theobject spread operator const myOriginal = { someProp: "with a string value", anotherProp: { withAnotherProp: 1, andAnotherProp: true } }; const myShallowCopy = {...myOriginal}; ...
If you simply want to deep copy the object to another object, all you will need to do isJSON.stringifythe object and parse it usingJSON.parseafterward. This will essentially perform deep copying of the object. letuser1 = {name:'Javascript Addicted',age:34,university: {name:'Shiraz Bahonar...