createComparionFunction只能访问自己这个外面的作用域,而不能访问内部匿名函数的作用域;内部匿名函数可以访问两个作用域,自己以及createComparisonFunction。 functioncreateComparisonFunction(propertyName){returnfunction(object1,object2){varvalue1=object1[propertyName];varvalue1=object2[propertyName];if(value1<value...
To start using xterm.js on your browser, add thexterm.jsandxterm.cssto the head of your HTML page. Then create aonto which xterm can attach itself. Finally, instantiate theTerminalobject and then call theopenfunction with the DOM object of thediv. <!doctypehtml>varterm =newTerminal...
promise避免了回调地狱,它将callback inside callback改写成了then的链式调用形式。 但是链式调用并不方便阅读和调试。于是出现了async和await。 async和await将链式调用改成了类似程序顺序执行的语法,从而更加方便理解和调试。 我们来看一个对比,先看下使用Promise的情况: ...
1. 概述 Commander.js是一个在NodeJS环境下便捷地用于构建搞质量命令行工具的库,vue-cli 等很多命令行工具都是由它构建。inquirer.js是一个实现交互式命令行界面的NodeJS库,通过使用该库能够帮我们实现命令界面的交互式。kolorist是一个 2. 命令的相关概念 3. 使用Commander.js搭建命令工行工具 3.1 安装 npm in...
//制作空心圆柱源码 var HollowBufferCylinder = function (radiusTop, radiusBottom, radiusStep, height, radialSegments, heightSegments, openEnded, thetaStart, thetaLength, phiSegments) { BufferGeometry.call(this); this.type = 'HollowBufferCylinder'; this.parameters = { radiusTop: radiusTop, radiusBot...
function savedCallbackUnreliable({ newFileName, newFileFormatID, newFileHandle, newBlob }) (optional): a function you call when the user has saved the file. The newBlob should come from getBlob(newFileFormatID). dialogTitle (optional): a title for the save dialog.Note...
We call the user-controllable console a "virtual console", to distinguish it from the Node.js console API and from the inside-the-page window.console API. By default, the JSDOM constructor will return an instance with a virtual console that forwards all its output to the Node.js console....
db.User.get(userId,function(err, user) {if(err) {throwerr }// ...usernameSlug =slugifyUsername(user.username)// ...}) }catch(e) {console.log(‘Ohno!’) } If the callback to “db.User.get” fired asynchronously, the scope containing the try-catch block would have long gone out...
I have a Default.aspx that I implemented the code below. Inside this event I need call a C# method to unlink the current client that close the browser. window.onbeforeunload = function (event) { }; My method is on Default.aspx.cs and call "UnlinkOperator" like...
%OptimizeFunctionOnNextCall(trigger); trigger(_=>_); trigger( _=>{ obj3.c = 1.1; for (let i in obj1) {} } ); 调试可以看到,在执行完callback后,map->descriptor_array->enum_cache已经被修改,其中enum_cache.keys/ind...