console.log(ary2.next());//Object {value: Array[2], done: false} value:Array[2] ---[0:0,1:1]; console.log(ary2.next());//Object {value: Array[2], done: false} value:Array[2] ---[0:1,1:2]; //可以看出每次执行这个next().都会返回一个该数组的索引和值组成的新的数组,被...
function map(f, a) { const result = new Array(a.length); for (let i = 0; i < a.length; i++) { result[i] = f(a[i]); } return result; } 在以下代码中,该函数接收由函数表达式定义的函数,并对作为第二个参数接收的数组的每个元素执行该函数: jsCopy to Clipboard function map(f,...
console.log(ary2.next());//Object {value: Array[2], done: false} value:Array[2] ---[0:0,1:1]; console.log(ary2.next());//Object {value: Array[2], done: false} value:Array[2] ---[0:1,1:2]; //可以看出每次执行这个next().都会返回一个该数组的索引和值组成的新的数组,被...
js consthome="c:\\temp"; 也可以在换行之前加上反斜杠以转义换行。这样反斜杠和换行都不会出现在字符串的值中。 js conststr="this string \ is broken \ across multiple \ lines.";console.log(str);// this string is broken across multiple lines....
Learn about the StyleSheetList interface, including its properties and methods, code examples, specifications, and browser compatibility.
$ mdn array#Methods Opens theArraydocumentation on MDN in your browser and jumps down to theMethodssection. Compatability mdnusesopenwhich tries to find a suitable command for opening URLs in your browser, regardless of which platform you're on. If you're having problems usingmdnon your platfo...
jsCopy to Clipboard // Legacy array comprehensions [for (x of iterable) x] [for (x of iterable) if (condition) x] [for (x of iterable) for (y of iterable) x + y] // Legacy generator comprehensions (for (x of iterable) x) (for (x of iterable) if (condition) x) (for (x ...
Once established, you can reference elements in the array using the object's methods, or using standard array index syntax (that is, using bracket notation). 311 WeakMap WeakMap对象就是简单的键/值映射.但键只能是对象值,不可以是原始值. 312 WeakMap.prototype.delete() delete() 方法可以从...
Learn about the HTMLCollection interface, including its properties and methods, specifications and browser compatibility.
HTML #dom-settimeout-dev See also Polyfill ofsetTimeoutwhich allows passing arguments to the callback incore-js Window.clearTimeout() WorkerGlobalScope.setTimeout() Window.setInterval() Window.requestAnimationFrame() Window.queueMicrotask()...