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  MySQL Index Merge Optimization Practices

In production environment databases, it is often seen that some SQL where conditions include: equal condition on a normal index + primary key range query + order by limit Although using a normal index would be more efficient, the system chooses to use index merge instead in some cases. This article explores such index merge situations. Index Merge Official Introduction   The Index Merge access method retrieves rows with multiple range scans and merges their results into one. Generall...

   INDEX MERGE,MYSQL,PRIMARY INDEX,SECONDARY INDEX     2024-09-10 04:52:26

  Let 's write some front end codes

I've seen a lot of arguments that there is no much technical value writing web portal, I think that the vast majority of good programmers will try many different things. The low level development and machine learning are not the only technologies which are  full of wisdom and challenges, I wrote web site for a few years, it is difficult to say that this is my initial interest, although I touched on other technologies as well, I still feel building website is challenging. Front end developme...

   Front end development, JavaScript,CSS     2013-01-22 04:00:24

  REST和gRPC对比全知道

长期以来，REST是构建API的唯一“标准”。它取代了混乱的“太多XML”的SOAP。但是近年来，出现了新的替代品。2015 年，Facebook 向公众发布了GraphQL，而 2016 年，Google 推出了gRPC。本文将重点介绍 gRPC，并与仍广泛使用的 REST 进行比较。 概述 以下表格将为您提供讨论点的概述，并显示 REST 和 gRPC 的优劣之处。 主题 REST gRPC 标准化 没有标准 定义明确 范式 基于资源...

   COMPARISON,GRPC,REST     2023-04-29 06:44:09

  JavaScript tips both novice and veteran developers can benefit from

In this post, we will share some less known but powerful JavaScript tips which can benefit both novice and veteran JavaScript developers. 1. Truncate array with array length We all know that object are passed by reference in JavaScript, but we may be bitten by this rule. Please check below example: var arr1 = arr2 = [1, 2, 3]; //Change arr1 arr1 = []; // arr2 will still be [1,2,3] arr1 and arr2 point to the same array [1,2,3] initially, later when arr1 repoints to [], the reference to arr2 is n...

   JavaScript,Array,push     2013-08-21 04:09:10

  Skills Needed to be a Web Developer in 2011

Many web developers think they already have all the knowledge they need to continue their careers. Check out this list of the ten skills all web developers must have to succeed in 2011 and beyond, and see how you measure up.1) Speak The Basic Languages of the WebBesides the content mark-up of HTML and the style rich sheets of CSS, how are you at your JavaScript and other advanced DHTML features? HTML 5, the latest upcoming W3C standard, includes audio and video embedding, database connectivity a...

   HTML5,Web skills,PHP,.NET,Java     2011-05-12 00:47:49

  A trap about PHP random number

The method to get random number in PHP is very simple, we only need to use rand() function. int rand ( int $min , int $max ) One function call can return the random number in a specified range. But in fact, the random number in computer is actually pseudorandomness, generally to increase the randomness, we may set a random seed before calling rand(). void srand ([ int $seed ] ) According to other language features, we should pass a time value as a parameter to the srand() function, generally...

   PHP,rand,srand,mt_rand     2013-06-07 09:10:10

  Python Process Protection Watchdog

Project Design Purpose: During participating the cyber exercise as red team member, we found that the injected malware or attack launching program can easy be stopped by the blue team or defense program / mechanisms via killing the process / deleting the file. To address this, our project aims to develop a robust watchdog program designed to bind to target programs, diligently monitor their execution states, and ensure uninterrupted functionality. Continuous Monitoring: Establish a vigilant wa...

       2024-09-14 11:09:14

  Why you don’t need a programmer

Once or twice a month I get the question from an aspiring entrepreneur that’s been pushing their idea forward in hopes to (very soon) create a company out of what they’ve been working so hard on.  They’ve spent countless hours working through all the details of what this new product will do, who they’re going to partner with and what they’re going to charge for it. They may even be on the Lean Startup bandwagon and actually talked with potential custo...

   Programmer,Necessary,No need     2012-03-30 07:37:39

  Apple's new patent for non-programmers

U.S. Patent and Trademark Office this week announced a new Apple patent called  "Content Configuration for Device Platforms" which they applied in December 2011. This patent describes a new border software that allows users who do not understand code to create applications  .The patent mentioned that computer programming language has become the obstacles to creating applications, because a lot of content writers and designers do not have knowledge of computer programming.Thi...

   Apple,New patent,Authoring tool     2012-04-15 01:16:17

  Have you used these JavaScript libraries before?

Are you a vanilla JavaScript developer or a JavaScript library lover?  If you are a vanilla JavaScript developer, please feel free to step away silently because you may not get what you want, but if you are a library or framework lover, please bookmark this page as what we list below are what you may use in the future. There are tons of JavaScript libraries created to ease the headache of developers who have to deal with different browsers on different devices. You may use some of them befo...

   JavaScript,Framework,Library     2014-09-27 22:06:55

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