Array.of(7);// [7]Array.of(1,2,3);// [1, 2, 3]Array(7);// [ , , , , , , ]Array(1,2,3);// [1, 2, 3] 技巧6 - 使用 Array 构造函数和展开操作符 代码语言:javascript 代码运行次数:0 运行 AI代码解释 constnumbers=[1,2,3,4,5];constcopy=newArray(...numbers);copy.p...
Usingfor loopwith index assigned with initial number and increment by 1 until end of the number, and add an index to an array. Here is an example to create an array of sequence numbers from 1 to 50. varnumbers=[];for(vari=1;i<=50;i++) {numbers.push(i);}console.log(numbers); ...
functiongenerateArrayOfNumbers(numbers){return[...Array(numbers).keys()].slice(1)} generateArrayOfNumbers(numbers)will generate and return N-numbers that you pass to this function as a parameter. E.g. if you callgenerateArrayOfNumbers(10), the output will be: ...
numbers - Name of the array. [10, 30, 40, 60, 80] - Elements of the array. Examples of JavaScript Arrays Here are a few examples of JavaScript arrays: // empty array const emptyArray = []; // array of strings const dailyActivities = ["eat", "work", "sleep"]; // array with...
const salad = new Array(' ', ' ', ' ', ' ', ' ', ' ', ' '); 注意:new Array(2)会创建一个长度为 2 的空数组,然而new Array(1,2)则会创建一个包含两个元素(1 和 2)的数组。 另外,Array.of()和Array.from()方法,以及展开运算符(...)也可以创建数组。我们后面会学习它们。
});// [false,true,true]numbers.filter(function(n) {returnn >1; });// [2,3]numbers.filter(function(n) {returnn +1; });// [1,2,3] some()返回布尔值,只要数组有一项符合条件就为true letisOk = arr.some(item=>item >2)
numbers.foreach(function(x) { console.log(x % 2 == 0); }); 1. 2. 3. 使用for…of 循环迭代 用for 循环和 forEach 方法迭代数组 for (let n of numbers) { console.log(n % 2 == 0 ? "even" : "odd"); } 1. 2. 3.
但是,当您将其他类型的值(如字符串)传递给 Array() 构造函数时,您将创建一个包含该值元素的数组。例如: let athletes = new Array(3); // creates an array with initial size 3let scores = new Array(1, 2, 3); // cre...
在ES6中,引入了Array.of()方法,它允许我们创建具有指定元素的新数组。与Array构造函数不同,Array.of()不会将单个数字参数解释为数组长度。例如: var numbers = Array.of(1, 2, 3, 4, 5); 1. 使用扩展运算符 ES6还引入了扩展运算符(spread operator),它可以将一个可迭代对象(比如字符串、集合、数组等)...
TL;DR —Sort an array of numbers in ascending order using: myArray.sort((a, b) => a - b); Arraysin JavaScript are data structures consisting of a collection of data items. Because Javascript is not a typed language, Javascript arrays can contain different types of elements -strings,numbe...