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  Fastjson just fixed a bug which might cause out of memory issue

Fastjson just fixed a bug which might cause service down a few days ago. This bug is caused by some mishandling of special character \x which is an escaped character to indicate hexdecimal number. The impact of this bug would be big if the attacker constructs a malicious data which would cause the service down.  The code which causes the issue is in com.alibaba.fastjson.parser.JSONLexerBase#scanString, when a JSON string is passed in, fastjson would parse the string character by c...

   FASTJSON,ALIBABA,BUG,NEWS     2019-09-07 06:03:49

  Coming up Next for JavaScript Web Apps Is Next.Js 3

Are wondering who is going to be the next PHP of the internet; except JavaScript. Next.js is all set to bring the PHP experience to JavaScript with its latest version. As the technology continues to be considered as a “win” amongst a number of developers across the globe, professionals are trying to improve it as much as they can. Because of its minimalist approach to server-rendered apps, this highly customizable framework can be recommendable for beginners as well as experienced pr...

   NEXT.JS3,JAVASCRIPT     2017-11-20 23:43:38

  How to be an excellent programmer

To use a programming language is very easy for a programmer, but it's a dream for many programmers to be an expert software developer. There are five levels of programmers: Novice, Senior novice, competent, proficient, and expert. Most programmers are senior novice. And programmer living in this level are a lot of people who have 1 to 10 years work experience.As a programmer, how to find the bottlenecks for your improvement and how to improve yourself quickly? This is really not an easy question...

   Programming,Tips,Habit     2013-03-26 09:53:38

  Maintain multiple versions of Go in one single environment

In a development environment, there might be multiple projects going on at the same time and they may require different development environments with different versions of build tool. In many programming languages, it is possible to have multiple versions of different build tool or development tool on a single environment. For example, there can be multiple JDKs, multiple versions of Ruby using RVM. For GoLang, there is a similar tool called GVM which can also be used to maintain multiple versio...

   GOLANG,GVM,GVM PKGSET,RVM     2019-11-10 00:43:47

  A simple tutorial on GoLang connecting to Clickhouse

Go, also known as Golang, is a statically-typed, concurrent programming language created by Google. ClickHouse is a high-performance, column-oriented database management system that can be used for real-time data analysis. This tutorial will provide a deep dive into how to connect to ClickHouse from a Go program, including how to perform common database operations such as SELECT and INSERT statements. Before proceeding, it is assumed that you already have Go and ClickHouse installed on your mach...

   GOLANG,CLICKHOUSE,TUTORIAL     2023-02-11 07:05:36

  A simple example of git bisect command

git bisect is a very powerful command for finding out which commit is a bad commit when bug occurs.  The rationale behind this command is that it pin locates the bad commit by divide and conquer. It divides the commit history into two equal parts, then determines whether the bad commit is at the first half or at the other half. This process will continue until the bad commit is located. Here is a really good example created by bradleyboy, this is a simple git repository which demonstr...

   GITHUB,GIT,GIT BISECT     2019-07-12 10:31:51

  Understanding How is Data Stored in RDBMS

We all know that DBMS (database management system) is used to store (a massive amount of) data. However, have you ever wondered how is data stored in DBMS? In this post, we will focus on data storage in RDBMS, the most traditional relational database systems. Physical Storage Data can be stored in many different kinds of medium or devices, from the fastest but costy registers to the slow but cheap hard drives, or even magnetic tapes. Nowadays, IaaS providers such as AWS...

   RDBMS,DATABASE     2019-02-04 09:25:36

  The war with spam comment

Spam comments are annoying and notorious. They are either malicious data from hackers to exploit the loopholes of the site or advertisements posted by robots. These kinds of comments have their own features and patterns, if we are careful enough, we can find ways to block most of them although it's not so easy. To block the comment with malicious executable codes such as JavaScript, we should remember one rule : never trust user input. So wherever there are user inputs, we need to check the vali...

   Spam comment,Block,Filter     2013-11-29 20:29:43

  Time to think about supporting max/min functions for integers in GoLang

Sometime back we wrote a post explaining why there is no max/min function support for integers in GoLang, one of the reasons is that no overloading is supported and the function name has been used for other numeric types float64. To solve this problem and make max/min function support integer as well, either GoLang should support overloading like in Java or the same set of functions need to be created in a different package other than standard math. These don't look like good options as overload...

   MIN,MAX,GENERICS,GOLANG     2021-07-24 03:14:42

  jQuery 2.0 gives up IE 6/7/8

jQuery 2.0 is released after 10 months development. jQuery 2.0 is customized for modern web browsers and also considers about mobile devices. But one big change is that jQuery 2.0 will not be  compatible with old versions of IE and its size is 10% less than the version 1.9.1. The execution efficiency is higher as well. jQuery 1.9.x will still be maintained by jQuery team, they will also provide update for it. Those websites which want to be compatible with all browsers should not upgrade to...

   jQuery 2.0,IE support     2013-04-20 07:58:16

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