A blog of my programming experience
The journey recorder on my website, which I have used for a few years to record my public transport journeys, has been split into a separate application which can be installed on any PHP web server, or integrated as part of any…
A few years ago, I wrote an article saying that Java has pointers. However, by typing Java pointer into Google, there are a lot of Stack Exchange questions shown on the top, some says Java does not have pointers, some says Java…
Today when I tried to open one of my websites https://longswims.net/ in order to update its contents, it stopped working throwing HTTP 500. I immediately signed in the web server and found out that the .php file was injected unknown code. I…
The type system in PHP has become safer each version since PHP 7.0, by using a strict type declaration on top of the PHP file. As a newly-developed feature, it doesn’t come with the billion-dollar mistake of allowing NULL for variables declared…
After my previous post about static members in various programming language, I decide to write a post about the word static in depth. static is a key word in multiple programming languages, with multiple distinct but related meanings. The history The static…
static keyword is used to represent class members, i.e. members which are shared among the class, as opposed of instance members which is unique to an object instance, in many programming languages, including PHP. However, the static functionality in PHP is much…
As my programming experience begins to diverse, from traditional command-line programs to web and app development, I have used many programming languages, some of which I like, and some I don’t like. One particular aspect of programming languages, type system, contributes to…
Java has pointers. People who say that Java does not have pointers are lying. The most confusing point is that, pointers in Java are not called pointers, but called “references” instead. However, a reference is completely different from a pointer. Although Java…
In C++, polymorphism does not take place within constructors: #include <iostream> using namespace std; struct Base { Base() { foo(); } virtual ~Base() {} virtual void foo() { cout << “Base::foo()\n”; } }; struct Derived : Base { void foo() { cout…
Programming languages with built-in garbage collection (GC) is often praised as no memory leaks, less error-prone, etc but I don’t disagree with this. This article brings you some facts of GC that is never mentioned by advertisements. GC automatically frees resources that…