copy = options[ name ];// Prevent Object.prototype pollution// Prevent never-ending loopif( name ==="__proto__"|| target === copy ) {continue; }// Recurse if we're merging plain objects or arraysif( deep && copy && ( jQuery.isPlainObject( copy ) || ( copyIsArray =Array.isArra...
src = target[ name ]; copy = options[ name ]; // Prevent never-ending loop if ( target === copy ) { continue; } // Recurse if we're merging plain objects or arrays if ( deep && copy && ( jQuery.isPlainObject( copy ) || ( copyIsArray = jQuery.isArray( copy ) ) ) ) { ...
// Recurse if we're merging plain objects or arrays if ( deep && copy && ( jQuery.isPlainObject( copy ) || ( copyIsArray = Array.isArray( copy ) ) ) ) { src = target[ name ]; // Ensure proper type for the source value if ( copyIsArray && !Array.isArray( src ) ) { clon...
// 深拷贝function deepclone(obj) { function copyList(arr) { let result = [] for (let item of arr) { result.push(this.deepclone(item)) } return result } if (typeof obj === "object") { if (Array.isArray(obj)) { return copyList(obj) } else ...
Unfortunately, all of these create shallow copies, not deep ones.Shallow cloning in JavaScript # With a shallow copy, the original array or object is a unique copy, but any arrays or objects contained within it are actually just references to the original....
对于引用(对象)类型来说,这种只是复制对象引用地址被称为浅拷贝(shallow copy),与之对应的,如果在堆中拷贝了一模一样的数据则被称为深拷贝(deep copy)。 将对象数据保存在堆中能大大节省内存空间,如果整个中国的名单保存在变量中,使用栈来保存则每次复制会拷贝整个数据(每次调用函数传参也属于执行了一次复制),内存...
// 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...
vararray=[1,2,3,4];functioncopy(array){letnewArray=[]for(letitemofarray){newArray.push(item);}returnnewArray;}varcopyArray=copy(array);copyArray[0]=100;console.log(array);// [1, 2, 3, 4]console.log(copyArray);// [100, 2, 3, 4] ...
Like the spread operator, slice() only creates a shallow copy of an array. If the array contains nested arrays or objects, the slice() method will only create a shallow copy of the top-level elements, and the nested elements will be shared between the original array and the copy....
objects or arrays const shallowCopy = {...calendarEvent}又或者是下面两种方式const shallowCopy = ...