In Perl, what is a good way to perform a replacement on a string using a regular expression and store the value in a different variable, without changing the original? ...

It wasn't that long ago that I was a beginning coder, trying to find good books/tutorials on languages I wanted to learn. Even still, there are times I need to pick up a language relatively quickly for a new project I am working on. The point of this post is to document some of the best tutorials ...

Specifically this is regarding when using a client session cookie to identify a session on the server. 12 Answers ...

I was curious about how other people use the this keyword. I tend to use it in constructors, but I may also use it throughout the class in other methods. Some examples: ...

I've read the Wikipedia articles for both procedural programming and functional programming , but I'm still slightly confused. Could someone boil it down to the core? ...

What is the best approach to calculating the largest prime factor of a number? 27 Answers ...

Given two different image files (in whatever format I choose), I need to write a program to predict the chance if one being the illegal copy of another. The author of the copy may do stuff like rotating, making negative, or adding trivial details (as well as changing the dimension of the image). ...

I'm using markdown to edit this question right now. In some wikis I used wiki markup. Are they the same thing? Are they related? Please explain. If I want to implement one or the other in a web project (like stackoverflow) what do I need to use? ...

I want to expand my programming horizons to Linux. A good, dependable basic toolset is important, and what is more basic than an IDE? ...

What is the purpose of annotations in Java? I have this fuzzy idea of them as somewhere in between a comment and actual code. Do they affect the program at run time? ...