function deepCopy(obj, hash = new WeakMap()) { if (obj == null) return obj; // 处理null...
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....
deep = false; // Handle a deep copy situation 处理深拷贝 if ( typeof target === "boolean" ) { deep = target; // Skip the boolean and the target // 跳过布尔和目标,重新赋值target target = arguments[ i ] || {}; i++; } // Handle case when target is a string or something (p...
deep =false;// Handle a deep copy situation 处理深拷贝if(typeoftarget ==="boolean") { deep = target;// Skip the boolean and the target// 跳过布尔和目标,重新赋值targettarget =arguments[ i ] || {}; i++; }// Handle case when target is a string or something (possible in deep copy...
constlodashClonedeep=require("lodash.clonedeep");constarrOfFunction=[()=>2,{test:()=>3,},Symbol('4')];// deepClone copy by refence function and Symbolconsole.log(lodashClonedeep(arrOfFunction));// JSON replace function with null and function in object with undefinedconsole.log(JSON.parse...
Javascriptの配列をコピーする時には、単に代入する、第一階層の値だけコピーする(Shallow Copy)、全てをコピーする(Deep Copy)の3通りのコピー方法がある。 例を見ると次の通り constarray=[ 1,1,1,1,{a:1}];constarray2=array;// 代入constarray3=[...array];// spread演算子による展開代...
Another deep copy solution is to turn the object into a string, usingJSON.stringifyand turn it back into a (deeply copied) object usingJSON.parse. It works likestructuredClonebut full of caveats such as unpredictable precision loss on floating point numbers, and not to mention date objects cea...
Deep Copy Shallow Copy Deep Copy This a method of copying contents from one object to another object. In this copying technique, the changes made in the copied object are not reflected in the original object. This shows that the new object copy created and the original object do not share ...
Default implementation ofObject.clone()creates the shallow copy of an object. To create the deep copy of an object, we need to modify mutable fields of the object returned bysuper.clone()before returning to the caller. That’s all about shallow copy and deep copy in Java. ...
Python Shallow vs Deep Copy: Here, we are going to learnwhat are the shallow copy and deep copy in Python programming language? Submitted bySapna Deraje Radhakrishna, on October 03, 2019 In python, the assignment operator does not copy the objects, instead, they create bindings between an ob...