JAR Tips: Loading dependencies

If you are writing a typical console based application in Windows, you would end up with an executable (exe). You might also have one or more dependent libraries (DLL). The question is where do we place these DLLs so that they are picked up at runtime by the application; loaded and consumed. Actually it is no brainer, just put them along side the console application executable. Or you could place the DLLs in the System32 directory. Or you could add the directory to the PATH. Well, my point was actually to say that the DLLs can be simply placed alongside the executable and it would be picked up.

An Unfair World of Tuples, Anons., var and auto

It all began when I wanted to return more than one value from one of the methods. Although my attempts ended futile, it was fun exploring and musing how things could have been.

There are at least a couple of options to return multiple values from a method:-

  1. return an instance of a class that holds the values
  2. return a tuple

A funny moment of IoC

IoC - Inversion of control, is a design that enables fluid flow of control by decoupling tight dependencies between the portion of a code that exhibits behavior and another portion of code that provides required functionality. One form of IoC, as we know, is Dependency Injection (DI). For instance, a TextEditor could refer an ISpellChecker instead of direct coupling to a specific implementation of spell checker thereby enabling the text editor to switch spell checker or even use more than one.

Mutating Strings

Today, we question our beliefs! Is string really immutable?

string message = "Hello World!";

Console.WriteLine(message); // Prints "Hello World!"

unsafe {
  int length = message.Length;
  fixed (char *p = message) {
    for (int index = 0; index < length; ++index) {
      *(p + index) = '?';

Console.WriteLine(message); // Prints what? See for yourself!

A time when time did not exist …

Those of us, non-physicists, we do seem to realize that time is eternal. Yet there was a time when time did not exist; tough to comprehend? For us, time is something running on a clock or tracked on a calendar. Let me share what I think about when time did not exist.

Quiz: Choosing an array of integers !!!

In the recent interviews, I asked the candidates the following question:

Is there a difference that I need to consider in the following declarations? Both allocate fixed size array to store integers:

int[] na1 = new int[10];
Integer[] na2 = new Integer[10];

A-Team Library

A short while ago, I had to write a compelling document for a client about a library that I had developed during my tenure, call it A-Team Library or ATL. Having to learn the “eyes-wide-shut” culture to maintain the couples-of-decades old code and simultaneously develop on the top of it was very disheartening. It was time a lot of things were given fresh thoughts. Not the least of all duplication of code and functionality. But not just that. Like in a programming language, when there is more than one way of doing something, when those ways are opposing, it causes nothing but confusion. So was the case. The business seemed to be far from realizing it.

PHP Savers – PropertyBag

The ubiquitous and the universal data structure in PHP is the [array][1]. It is an amalgamation of commonly used data structures – list, map etc. In the recent times, PHP has also adopted object orientation and introduced classes. The syntactic difference in the way a property of an array and object poses an inconvenience in the user code1 specifically when there is a need to interact with code that is not open for change; legacy or not.