两种方法的不同之处在于Arrays.copyOf是通过创建一个新的数组来实现的copy,源码如下: 代码语言:javascript 复制 int[]copied=Arrays.copyOf(arr,10);//10 the the length of the new arraySystem.out.println(Arrays.toString(copied));copied=Arrays.copyOf(arr,3);System.out.println(Arrays.toString(copied)...
In this article, we will learn how to copy elements of an array into a new array of JavaScript. In JavaScript, arrays are normal objects containing the value in the desired key, which can be numeric. Arrays are JavaScript objects with a fixed numerical key and dynamic values containing any...
1, "true" ]; // 2) Array of literal-structures (array, object) const type2 = [ [], {} ]; // 3) Array of prototype-objects (function) const type3 = [ function () {}, function () {} ];
Topic:JavaScript / jQueryPrev|Next Answer: Use theslice()Method You can simply use theslice()methodto create a copy of a JavaScript array that behaves independently. This method returns a shallow copy of a portion of an array into a new array. ...
} else if (item instanceof Array) { newobj[key] = []; //定义一个空的数组来接收拷贝的内容 deepCopy(item, newobj[key]); //递归调用 } else { newobj[key] = oldObj[key]; } } } let obj1 = { name: 'zs', age: 18, gender: '男', ...
Personally, I think applications forArray.from()are pretty limited. I would only really use it to convert things into arrays that aren’t already. Array.slice()has much better browser support and does more stuff. The one benefit ofArray.from()—being able to modify items—is better handled...
var newArray = new Array ( dataArray1.values(), dataArray2.values(), // ... where values() (or something equivalent) would push the individual values into the array, rather than the array itself ); So now the new array contains all the values of the individual data arrays. Is the...
Arrays.copyOfRange(); 代码语言:javascript 复制 publicstatic<T>T[]copyOfRange(T[]original,int from,int to){returncopyOfRange(original,from,to,(Class<?extendsT[]>)original.getClass());} 入参:数组,开始下标,结束下标 反参:数组 功能描述:将一个原始的数组original,从下标from开始复制,复制到上标...
JavaScript-Anleitungen Deep-Copy-Array in JavaScript Subodh Poudel12 Oktober 2023 JavaScriptJavaScript Array Video Player is loading. Current Time0:00 / Duration-:- Loaded:0% In diesem Artikel lernen Sie das Konzept der tiefen und flachen Kopie kennen. Der Artikel stellt auch Möglichkeiten zum...
if (obj[i] instanceof Array) { out[i] = copyArr(obj[i]); } else out[i] = obj[i]; } return out; } var arr05 = copyArr(arr) console.log(arr05); 1. 2. 3. 4. 5. 6. 7. 8. 9. 10. 11. 12. 13. 14. 数组的拷贝介绍到这里,大家日常开发中肯定是可以用的到的。