Loop through objectsvar asyncLoop = require('node-async-loop'); var obj = { 'aa': 'AAAA', 'bb': 'BBBB', 'cc': 'CCCC', 'dd': 'DDDD', 'ee': 'EEEE' }; asyncLoop(obj, function (item, next) { console.log(item); // Get object key with: item.key // Get associated value...
全局对象解析 JavaScript 中有一个特殊的对象,称为全局对象(Global Object),它及其所有属性都可以在程序的任何地方访问,即全局变量。 在浏览器 JavaScript 中,通常 window 是全局对象, 而 Node.js 中的全局对象是 global,所有全局变量(除了 global 本身以外)都是 global 对象的属性。 在Node.js 我们可以直接访问到...
从UDPWrap 类的定义可知,UDPWrap 继承HandleWrap,HandleWrap 继承AsyncWrap,AsyncWrap 继承BaseObject,所以 UDPWrap 最终也继承 BaseObject。BaseObject 构造函数内会关联 JS 和C++ 对象,BaseObject 类的构造函数代码如下 // node-18.15.0/src/base_object.cc BaseObject::BaseObject(Realm* realm, Local<Object> ...
Let’s conceptualize it first through some fake-ish code: // `eventLoop` is an array that acts as a queue// (first-in, first-out)vareventLoop=[];varevent;// keep going "forever"while(true){// perform a "tick"if(eventLoop.length>0){// get the next event in the queueevent=event...
var hello = function(name, callback){ setTimeout(function(){ callback(null, {hello: name}); }, 1000); }; node> async.dir(hello, 'world'); {hello: 'world'} ### noConflict() Changes the value of async back to its original value, returning a reference to the async object. ...
There is a triggerAsyncId in each async scope, which is used to indicate which async scope triggered the current function; Through asyncId and triggerAsyncId, we can trace the entire asynchronous call relationship and link, which is the core of full link tracking; ...
我们今天将对 Node.js源码进行探索,深入理解 cjs 模块的加载过程。我们阅读的 node 代码版本为 v17.x: 源码阅读 内置模块 为了知道require的工作逻辑,我们需要先了解内置模块是如何被加载到 node 中的(诸如 ‘fs’,’path’,’child_process’,其中也包括一些无法被用户引用的内部模块),准备好代码之后,我们首先要...
const value: Object | Function = moduleDefinition[key][1]; // arrayUnwrap 主要是判断模块定义类型,如果是 'value' 或者 'factory',则直接返回对应函数 // 否则判断第二个参数类型,如果是数组格式,则对其按照模块标准定义格式重新进行格式化再返回格式化后的函数 ...
//docs.microsoft.com/azure/media-services/latest/live-events-outputs-concept // 1) Understand the billing implications for the various states // 2) Understand the different live event types, pass-through and encoding // 3) Understand how to use long-running async operations // 4) Understand ...
constfastJson=require('fast-json-stringify')conststringify=fastJson({title:'Example Schema',type:'object',properties:{name:{type:'string'},age:{type:'integer'},books:{type:'array',items:{type:'string',uniqueItems:true}}})console.log(stringify({name:'Starkwang',age:23,books:['C++ Primier...