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SEARCH KEYWORD -- Code.Programming

  <=> operator in MySQL

Have you ever seen "<=>" in a SQL query while using MySQL? Does it mean less and equals to and greater than? Actually if you consider it as the union of <= and =>, great, you are close to it. This is one form of equal operator in MySQL, it has the similar meaning to the = operator with some subtle difference. According to MySQL documentation, <=> is NULL-safe equal. This operator performs an equality comparison like the = operator, but returns 1 rather than NULL if both operand...

   MySQL,NULL safe,<=>     2014-03-24 06:23:22

  Benefits and Drawback of a Layered Architecture

Most enterprises today are application centric. But the problem with the application is that their database schemas, user interfaces, programming interfaces and object models are tightly coupled and difficult to change. If you want to add a new field to a database table and you’re lucky, the change will reflect through the entire system. But often the change needs to be replicated manually across the entire system. And as applications are difficult to change, adding business rules or proce...

   JAVA, PROGRAMMING,WEB DEVELOPMENT,ENTERPRISE APPLICATION     2017-05-04 08:19:34

  new() and make() in GoLang

GoLang is a modern, statically typed, compiled programming language designed for building scalable, concurrent, and efficient software. It provides various built-in functions and features that help developers write concise and efficient code. Among them are the new() and make() functions, which may appear similar at first glance but serve different purposes in GoLang and are crucial for memory allocation and data initialization. In this blog article, we will explore the differences between the n...

   NEW,MAKE,GOLANG     2023-11-18 13:43:25

  Why Dynamic Programming Languages Are Slow

In a statically typed language, the compiler knows the data-type of a variable and how to represent that. In a dynamically-typed language, it has to keep flag describing the actual type of the value of the variable, and the program has to perform a data-dependent branch on that value each time it manipulates a variable.  It also has to look up all methods and operators on it. The knock-on effect of this on branching and data locality is lethal to general purpose runtime performance. T...

   Dynamic language,Slow,Analysis     2012-03-26 15:33:11

  Why do I need a debugger?

  When I begin to learn a new programming language, I will try and master the debugger for it as early as possible. For example, in 2013, while I touched the Go, there seems only gdb for use. Although gdb itself is not a good choice (From Debugging Go Code with GDB): As a consequence, although GDB can be useful in some situations, it is not a reliable debugger for Go programs, particularly heavily concurrent ones. But at that time there was no other choice. So after delve&nb...

       2017-07-21 22:53:16

  Why Lua

In this article, I would like to discuss why you should use Lua. This all started with a message that recently popped up on the Lua mailing list regarding why isn't Lua more widely used? The answers went from randomness to lack of libraries to a variety of other things, but the one that resonated with me most was that there are fewer people who enjoy the do it yourself approach, which Lua fully embraces. I've come to think of Lua as the Arch Linux of programming languages. Which, almost by d...

   Lua,Feature,C,Simple,Portable     2012-02-27 04:58:15

  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

  Good programmer made bad designers

I got an email request to publish this article a few days ago.I was actually on the verge of moving the email to the trash when I noticed the first name of the author: Rand.For those of you not familiar with the Wheel of Time series, the main character’s name is Rand.I admit that it’s an embarrassing weak reason to respond to a strange email, but reading some 10,000 pages of a fantasy series obviously messes with your mind.Then again, it’s probably no stranger than...

   Programmer,Designer,Comparison     2011-08-29 22:06:33

  Java vs F#

Dr Cliff Click of Azul Systems, specialists in manycore JVM systems, recently published a blog post about the performance of Java compared primarily to C and C++ but also discussing C# and .NET. Three of Cliff's comments are of particular interest:Under the heading "Places where C/C++ beats Java for obvious reasons":"Value Types, such as a 'Complex' type require a full object in Java." - Dr Cliff ClickWhat Cliff forgot to mention is that .NET also provides value types and a far more compell...

   Java,F#,Performance,JVM     2012-03-07 05:07:31

  World leaders who know how to code

World leaders are those people who have extraordinary speaking skills and are a group of very busy people in most people's impression. But among them, there are a few who know how to program as well. Today we are going to summarize some of them. Lee Hsien Loong -- Singapore Prime Minister Lee Hsien Loong, Singapore Prime Minister posted a C++ program about Sudoku which he wrote several years ago. He shared the source code on Google Drive as well.  In 1971, Mr. Lee studied Mathema...

   World leader, Coding, Programming     2015-08-02 05:56:20

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