...wn as "internal linkage" or "static storage duration". (Don't do this in headers except for constexpr. Anything else, and you end up with a separate variable in each translation unit, which is crazy confusing) If it's a variable in a function, it can't be accessed from outside of the function, just ...

...assignment While these answers are intellectually interesting, I've not read the short simple answer: Use the keyword final when you want the compiler to prevent a variable from being re-assigned to a different object. Whether the variable is a static variable, member variable, local variab...

I have configured my Apache by myself and have tried to load phpMyAdmin on a virtual host, but I received: 34 Answers ...

...dwidth is also a limiting factor, particularly for multicores and multithreaded applications where many threads wants to use the memory bus. A different set of techniques help addressing the latter issue. Improving spatial locality means that you ensure that each cache line is used in full once it ...

... For use case #2, passing an optional argument to a method, this could be made to work, but it's rather clumsy. Suppose you have a method that takes a string followed by an optional second string. Accepting an Optional as the second arg would result in code like this: foo("bar", Optional.of("baz"))...

...when the path in target is a JSON object's key. In that case, it will only add a new key-value pair for the JSON object when the key is not used. If it's used, it will raise an error: SELECT jsonb_insert('{"a":[null,{"b":[1]}]}', '{a,1,c}', jsonb '[2]') -- will yield jsonb '{"a":[null,{"b":[1],"c":[...

...d is club.club_id here. I named the queries after their author in this thread, with an index where there are two. I ran all queries a couple of times to populate the cache, then I picked the best of 5 with EXPLAIN ANALYZE. Relevant indexes (should be the optimum - as long as we lack fore-knowledge w...

...ionship without worrying about collisions (small integers do not have that advantage). If these membership relationships have any properties other than the bare fact that they relate a player and a team in a bidirectional fashion, they should have their own identity that is independent of both playe...

... a class 2D-vector class vec2 {float x,y;}, essentially, with operators to add, subract, scale, etc, and a distance and dot product function (i.e. x1 x2 + y1 y2). float minimum_distance(vec2 v, vec2 w, vec2 p) { // Return minimum distance between line segment vw and point p const float l2 = len...

...ng techniques that I've seen focused not on obfuscating the code, but instead on breaking the tools that people usually use to understand how code works. Finding creative ways to break disassemblers, debuggers, etc is both likely to be more effective and also more intellectually satisfying than jus...