array.findIndex()和array.find()十分类似,返回第一个符合条件的数组元素的位置,如果所有元素都不符合条件,则返回-1。 findIndex() 方法为数组中的每个元素都调用一次函数执行: 当数组中的元素在测试条件时返回 true 时, findIndex() 返回符合条件的元素的索引位置,之后的值不会再调用执行函数。 如果没有符合条...
。 lastIndexOf()——–array.lastOf(item,start) (从数组的末尾开始向前查找) item: 必须。查找的元素。 start可选的整数。规定在中开始检索的位置。省略该参数,则将从 array[arraylength-1]开始检索。 代码语言:javascript 代码运行:0 运行 AI代码解释 var arr = [1,4,7,107,18,7,26]...
{ var result = new array (); start = start || 0 ; end = end || this .length; //this指向调用的对象,当用了call后,能够改变this的指向,也就是指向传进来的对象,这是关键 for ( var i = start; i < end; i++){ result.push( this [i])...
Object||ArrayJSON-字符串化 null无内容响应 如果response.status未被设置, Koa 将会自动设置状态为200或204。 Koa 没有防范作为响应体的所有内容 - 函数没有有意义地序列化,返回布尔值可能会根据您的应用程序而有意义。并且当错误生效时,它可能无法正常工作 错误的属性无法枚举。 我们建议在您的应用中添加中间件...
This includes things like window.Array, window.Promise, etc. It also, notably, includes window.eval, which allows running scripts, but with the jsdom window as the global: const dom = new JSDOM(` document.getElementById("content").append(document.createElement("hr")); `, { runScripts:...
extensions: an array of file extensions, excluding the dot, with the preferred extension first, e.g. ["bmp", "dib"] defaultFileName (optional): a suggested file name, e.g. "Untitled.png" or the name of an open document. defaultPath (optional): a file handle for a document that was...
resolution: "array-union@npm:2.1.0" checksum: 5bee12395cba82da674931df6d0fea23c4aa4660cb3b338ced9f828782a65caa232573e6bf3968f23e0c5eb301764a382cef2f128b170a9dc59de0e36c39f98d languageName: node linkType: hard "array.prototype.findlastindex@npm:^1.2.3": version: 1.2.3 ...
An array of fields (columns) of the grid. Each field has general options and specific options depending on field type. General options peculiar to all field types: { type: "", name: "", title: "", align: "", width: 100, visible: true, css: "", headercss: "", filtercss: ""...
Colorwill create a new object for you from an object, string, or array. Note that this is a factory function,nota constructor. eg: var Green = Color("#00FF00"); var Red = Color({hue: 0, saturation: 1, value: 1}); var Blue = Color("rgb(0,0,255)"); var Cyan = Color({hu...
Add videojs.getAllPlayers to get an array of players. (#4842) (6a00577) add mediator middleware type for play() (#4868) (bf3eb45) playerresize event in all cases (#4864) (9ceb4e4) Bug Fixes do not patch canplaytype on android chrome (#4885) (f03ac5e) Chores generate a test ...