promise in node js

, index) {return new Promise (function (resolve, reject) {fs. readFile (file, 'utf-8', function (err, str) {if (! Err) {resolve (str)} else {reject (err) }}) ;}); return Promise. all (readFilsePromiseList );}). then (function (fileStrArray) {console. log ('after reading the so-called file: '+ fileStrArray );}); This Code indeed shows the elegance of nodejs development. So where is the problem? Currently, th

I needed a problem when I was working on the project today. I wanted to find a string, but I forgot it. It was in that file, so I remembered node. js, finding this string without any pressure, shares with you the following requirements: The entire directory is about 40 MB, and there are countless files. For a long time, I cannot tell which file the character string belongs. Powerful and eye-catching

Node. js Data Encryption Transmission Analysis, node. js Data Encryption Preface For encrypted data transmission, there are several methods that people often use. One is ciphertext transmission, and the other is ciphertext transmission. The other is to encrypt data using keys and decrypt data using public keys, the tra

Reprint: https://www.cnblogs.com/ooo0/p/6278102.htmlJS jquery get Element (parent node, child node, sibling node)One, JS get Element (parent node, child node, sibling node)varTest = doc

This article focuses on introducing node. blocking and non-blocking calls of js callback functions involve node. knowledge about js callback functions. If you are interested in this article, learn it together. First, node. as a javascript running platform,

This article mainly introduces node. the js entry-level instance helloworld describes node in detail. js simple output example helloworld implementation code and running method. If you need it, refer to the example in this article to describe node.

This article mainly introduces Node in detail. js module encapsulation and usage. If you are interested, refer to Node. js also has some function encapsulation, similar to the C # class library, which is encapsulated into a module for ease of use. After installation, use require () to introduce the call. I.

This article describes how to build a Node based on zero infrastructure. js, Express, Ejs, Mongodb server, and application development. This article provides a cost tutorial for Windows 8 systems. For other systems, see, if you need a Node, refer to the Introduction Guide for front-end developers in this article. in js

This article describes how to build a Node based on zero infrastructure. js, Express, Ejs, Mongodb server, and application development. This article provides a cost tutorial for Windows 8 systems. for other systems, see, if you need a Node, refer to the introduction guide for front-end developers in this article. in js

This article mainly introduces. the Redis method is used in js applications, and the simplest data read/write operations are related. If you need it, please ensure that Redis and Node are installed before you start this article. js and Node. redis extension of js -- node_red

This article mainly introduces how to easily create a node. js server (5): event processing program. This series of articles will create a complete node. js server step by step, if you need it, you can refer to the introduction of an event processor module to provide different feedback for different requests. This mod

This article mainly introduces the method and code for starting the script file of node. js at startup. Here, I will share it with you. If you need it, refer to it. The Code is as follows: #! /Bin/bash### BEGIN INIT INFO# Provides: xiyoulib# Required-Start: $ all# Required-Stop: $ all# Default-Start: 2 3 4 5# Default-Stop: 0 1 6# Short-Description: Start daemon at boot time# Description: Enable service pr

Node. js asynchronous I/O learning notes, node. js learning notes The term "Asynchronous" is widely used in the Web 2.0 wave, which swept the Web along with Javascript and AJAX. Asynchronous programming is rare in most advanced programming languages. PHP can best reflect this feature: it not only shields Asynchronizati

This article mainly introduces the amazing node. the routine analysis of js Reading Notes. If you need it, you can refer to the nodejs learning content of the next week for the use of several dependent packages and repeat the examples in the book. This article takes the routine as a clue to review the work of the week. 1. connect This routine mainly uses the connect dependency package. connect provides a m

Introduction to the most popular Node. js application development framework, node. js Application Development Rapid development, easy scalability, high performance, and robust robustness. The emergence of Node. js makes these dr

One, JS get Element (parent node, child node, sibling node) var test = document.getElementById("test"); var parent = test.parentNode; // 父节点 var chils = test.childNodes; // 全部子节点 var first = test.firstChild; // 第一个子节点 var last = test.lastChile; // 最后一个子节点　 var previous = test.previousSbiling; // 上一个兄弟

This article mainly introduces the most popular Node. introduction to js concise and full-stack development frameworks, this article explains Express. js, KOA, Total. js, Sails. js, Meteor, Mean. i/O and other frameworks. For more information, see Rapid development, easy sc

This article mainly introduces Node. js getting started Tutorial: install and configure Node on windows and Linux. the js method is illustrated in the following illustration. The detailed steps are to learn how to install node. js