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  4 asynchronous programming methods in JavaScript

You may know the execution environment of JavaScript is single threaded. The so called single thread means only one task can be running at any time, if there are many tasks, they need to be in a queue and wait for the previous task to be completed. The advantage of this mode is it's easy to implement and the execution environment is relative simple; the disadvantage is that if one task takes long time, the tasks following it must wait in the queue and this will delay other tasks consequently. Th...

   JAVASCRIPT,ASYNCHRONOUS PROGRAMMING, EVENT MODEL,PROMISE     2012-12-25 00:55:47

  Different types of font icons

A website with just text belongs to the pre Web 2.0 era. A modern site will have different icons appearing on different places on the site. This will give the visitor a better visual feeling. But to have a set of consistent and well crafted icons is not an easy task. It may even require a dedicated icon designer to design them. Fortunately, we now can use font icons provided by many people around the web. Today we will introduce some of them. Font Awesome Font Awesome is an open source font ico...

   font icon, web design, font awesome     2015-07-19 06:22:48

  8 powerful Chrome extensions

Chrome is a powerful browser, one reason why it's so powerful is that it has abundant extensions. There are various extensions in Chrome Web Store. They can meet all kinds of needs you have and they are very easy to install as well. Here we share with you 8 powerful extensions on Chrome. All of them can be downloaded from Chrome Web Store Holmes A bookmark search tool, if you have lots of bookmarks and you even don't know where they are. Hplmes can help you find them in real time by matching tit...

   Chrome,extension     2013-07-31 01:24:18

  The Internet : from 1969-1974

Internet was born 43 years ago. There are some big events in the history of Internet development. In my opinion, most of the big events happened at the first five years, i.e, from 1969-1974.  1969 : ARPANETThe Advanced Research Projects Agency Network (ARPANET), was the world's first operational packet switching network and the core network of a set that came to compose the global Internet. The first ARPANET transmission was between Stanford Research Institute and UCLA on 29th, October 1969...

   Internet,History     2012-06-22 09:55:51

  A tutorial on Github Actions

Github Actions is a CI/CD service created by Github. It aims to make it easy to automate all software workflows, now with world-class CI/CD. Build, test, and deploy code right from GitHub. It was launched in October 2018 and was officially available to all users in November 2019. This post will give an introduction of Github Actions and explain how it works. What is Github Actions Normally Continuous Integration includes some steps, fetching code, running test, sshing into remote server in...

   GITHUB,GITHUB ACTIONS,CI,CD     2019-12-23 05:33:39

  Some hidden XSS injection vulnerabilities

XSS injection refers to a Web page generates some unexpected executable js codes based on user input  and these executable codes are executed by web browser,i.e, the source code sent to web browser by the server contains some illegal js codes, and these illegal js codes are related to user's input. Common XSS injection vulnerabilities can be fixed with some functions such as htmlspecialchars(escaping HTML special characters) and strip_tags() or similar, but there are some hidden XSS injecti...

   XSS,PHP,Security,Code,JavaScript     2012-08-27 20:32:08

  NIO vs IO in Java

Java 1.4 provides a new API for handling IO -- NIO. This is a non-blocking and buffer oriented IO API. Below are main differences between the NIO and IO in Java. IO NIO Stream oriented Buffer oriented Blocking IO Non-blocking IO N/A Using selector Stream oriented vs Buffer oriented The main difference is that IO is stream oriented where the data is read byte by byte and the data will not be buffered normally.This means there is no pointer to move forward and backward in the stream. I...

   JAVA,IO,NIO     2016-01-10 01:40:02

  Exploring Open edX: A Global Platform for Online Education

Understanding Open edX The digital education sector has seen a rise in platforms that enhance global learning access. Open edX, in particular, has made a significant mark with its comprehensive and robust features. Companies like Raccoon Gang offer specialized open edX services to further enhance this platform's capabilities. This article delves into the essence of Open edX, highlighting its key components and global appeal. Open edX Core Features Course Authoring: User-friendly tools for cou...

   OPENEDX,LEARNING     2024-06-04 23:09:45

  10 design principles of Google data center

Google's data center supports the world's largest search engine, smart phone application platform and cloud computing services. The data center is Google's core engine and competitiveness. Over the years, Google also plays the role of the founder and innovator of large-scale web service data center technology. Its data center infrastructure design is also at the forefront of the industry, including renewable energy use, low-power refrigeration, new energy utilization as well as data center room ...

   Google,Data center,Design principle     2013-03-11 19:09:25

  Career Advancement: How to Achieve Success

Your career is key in terms of making the money that you want and providing a service that you've always dreamed of offering. Regardless of the type of career that you both want or have, there are many ways for you to advance within the field. By taking charge of your goals and doing something about them, you will be able to earn the amount of money that you want to become a true success. Get a More Specific Education Getting an education is a wonderful way for you to advance within your workpla...

   CAREER,EDUCATION     2020-03-17 01:41:39

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