What are bitwise shift (bit-shift) operators and how do they work?

I’ve been attempting to learn C in my spare time, and other languages (C#, Java, etc.) have the same concept (and often the same operators) … What I’m wondering is, at a core level, what does bit-shifting (<<, >>, >>>) do, what problems can it help solve, and what gotchas lurk around the bend? In … Read more

What is the difference between an abstract method and a virtual method?

What is the difference between an abstract method and a virtual method? In which cases is it recommended to use abstract or virtual methods? Which one is the best approach? 2 28 An abstract function cannot have functionality. You’re basically saying, any child class MUST give their own version of this method, however it’s too … Read more

The definitive guide to form-based website authentication [closed]

Closed. This question needs to be more focused. It is not currently accepting answers. Closed 5 years ago. The community reviewed whether to reopen this question 5 months ago and left it closed: Original close reason(s) were not resolved This question’s answers are a community effort. Edit existing answers to improve this post. It is … Read more