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How do I base64 encode (decode) in C?
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I know this question is quite old, but I was getting confused by the amount of solutions provided - each one of them claiming to be faster and better. I put together a project on github to compare the base64 encoders and decode...
Abusing the algebra of algebraic data types - why does this work?
...: Thanks! :] And yes, that's a great paper that develops these ideas. You know, I think at least 5% of my total reputation on SO can be attributed to "helping people understand one of Conor McBride's papers"...
– C. A. McCann
Feb 8 '12 at 19:39
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How to validate an email address using a regular expression?
...me web page as was the address.
Confirmation tokens are the only way to know you got the address of the person entering it. This is why most mailing lists now use that mechanism to confirm sign-ups. After all, anybody can put down president@whitehouse.gov, and that will even parse as legal, but it...
What are the differences between Clojure, Scheme/Racket and Common Lisp?
I know they are dialects of the same family of language called lisp, but what exactly are the differences? Could you give an overview, if possible, covering topics such as syntax, characteristics, features and resources.
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Remove the last three characters from a string
...s "read last 3 characters from string" This is later edited and I did not know, see the question edit history. Your comment helped me to correct my answer that became wrong after edit of the question.
– Adil
Jan 5 '16 at 4:55
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List of foreign keys and the tables they reference
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@roshan Now that you mention it, the column order feels a bit odd :) Obviously five years ago I wouldn't have thought that this answer would be viewed by so many!
– Vincent Malgrat
May 22 '14 at...
What is the most effective way for float and double comparison?
...the order of operations can produce different results, it is important to know how "equal" you want the numbers to be.
Comparing floating point numbers by Bruce Dawson is a good place to start when looking at floating point comparison.
The following definitions are from The art of computer progr...
What's the difference between design patterns and architectural patterns?
...tailed explanation but I will try to sketch the differences to best of my knowledge.
Patterns are distilled commonality that you find in programs. It allows us to deconstruct a large complex structure and build using simple parts. It provides a general solution for a class of problems.
A large co...
Undefined, unspecified and implementation-defined behavior
...clude <iostream>
int main()
{
char* p = "hello!\n"; // yes I know, deprecated conversion
p[0] = 'y';
p[5] = 'w';
std::cout << p;
}
The variable p points to the string literal "hello!\n", and the two assignments below try to modify that string literal. What does this p...
Why isn't String.Empty a constant?
...tring.Empty read only instead of a constant? I'm just wondering if anyone knows what the reasoning was behind that decision.
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