Easiest way to achieve what you want is to use JSON.stringify with JSON.parse to create a unlinked copy of array of objects. const OBJ1 = (name, tags) => ({ myname: name, mytags: tags, myvalue: 0, }) function createarray1() { var myarray=[]; myarray.push(OBJ1("NAME", [...
In javascript, we can copy the array to a new one using either of these three methods – slice() method, Array.from(), and spread operator. The use of an equals operator does not create a new copy of the array. Instead, a duplicate of the array’s references is made. ...
// 1) Array of literal-values (boolean, number, string) const type1 = [ true, 1, "true" ]; // 2) Array of literal-structures (array, object) const type2 = [ [], {} ]; // 3) Array of prototype-objects (function) const type3 = [ function () {}, function () {} ]; ...
obj变量是初始化的新对象的容器。copy变量指向同一个对象,并且是该对象的引用。所以基本上这个{ a: 1, b: 2, }对象是在说现在有两种方法可以访问我:通过obj变量或copy变量以任何一种方式传递给我,并且你通过这些方式对我所做的任何操作都会影响我。 此方法消除了任何形式的不变性,如果原始对象被代码的另一部分...
注意:Object.create 对于数组的深拷贝不理想。 JSON.parse 和 JSON.stringify 先用JSON.stringify 将对象序列化成字符串,再用 JSON.parse 解析回来,可以达到深拷贝的效果,并且对于多层对象同样有效。 letperson={name:"宁次",age:20,sister:{name:"雏田",age:18,},}letperson2=JSON.parse(JSON.stringify(person...
//深拷贝functiondeepclone(obj){functioncopyList(arr){letresult=[]for(letitemofarr){result.push(this.deepclone(item))}returnresult}if(typeofobj==="object"){if(Array.isArray(obj)){returncopyList(obj)}else{letresult={}for(letkeyinobj){result[key]=deepclone(obj[key])}returnresult}}else...
// 深拷贝functiondeepclone(obj){functioncopyList(arr){letresult=[]for(letitemofarr){result.push(this.deepclone(item))}returnresult}if(typeofobj==="object"){if(Array.isArray(obj)){returncopyList(obj)}else{letresult={}for(letkeyinobj){result[key]=deepclone(obj[key])}returnresult}}else...
constshallowCopy=Object.assign({},simpleEvent)constshallowCopy=Object.create(simpleEvent) 但是一旦我们有了嵌套项目,我们就会遇到麻烦: constcalendarEvent={title:"Builder.io Conf",date:newDate(123),attendees:["Steve"]}constshallowCopy={...calendarEvent}// 🚩 哎呀 - 我们刚刚把"Bob"添加到了复制品...
当我们改变valueCopy的值,它不会影响原来的value值。同理,当我们改变原来的值它也不会影响拷贝后的值。很好👍let value = 3;let valueCopy = value; // create copyconsole.log(valueCopy); // 3// Change valueCopyvalueCopy = 100console.log(valueCopy); // 100// ✅ ...
The rest is as expected, I create a one-element array with a ClipboardItem containing the blob, and the I write the array into the clipboard. You can use the above example to extrapolate how you would go about copying something else, like an XLS file. You need to fetch it, blob it,...