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Picking a random element from a set
How do I pick a random element from a set?
I'm particularly interested in picking a random element from a
HashSet or a LinkedHashSet, in Java.
Solutions for other languages are also welcome.
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How do I concatenate two strings in C?
...e that the function returns a block of heap allocated memory to the caller and passes on ownership of that memory. It is the responsibility of the caller to free the memory when it is no longer needed.
Call the function like this:
char* s = concat("derp", "herp");
// do things with s
free(s); // d...
Kill child process when parent process is killed
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From this forum, credit to 'Josh'.
Application.Quit() and Process.Kill() are possible solutions, but have proven to be unreliable. When your main application dies, you are still left with child processes running. What we really want is for the child processes to die as soon as t...
Fastest way to reset every value of std::vector to 0
...'s the fastest way to reset every value of a std::vector<int> to 0 and keeping the vectors initial size ?
6 Answer...
Why would anyone use set instead of unordered_set?
C++0x is introducing unordered_set which is available in boost and many other places. What I understand is that unordered_set is hash table with O(1) lookup complexity. On the other hand, set is nothing but a tree with log(n) lookup complexity. Why on earth would anyone use set instead ...
How to remove certain characters from a string in C++?
... How does this work? Is it not a double negative to use erase and remove? To me this reads: "erase the characters that are in positions where ()- aren't." And since each one is done at a time, shouldn't it remove ALL characters? I've read the documentation on both functions, and this ma...
How to access SOAP services from iPhone
...roxy server between the iPhone and the web service? Perhaps something that converts REST into SOAP for you?
You could try CSOAP, a SOAP library that depends on libxml2 (which is included in the iPhone SDK).
I've written my own SOAP framework for OSX. However it is not actively maintained and will ...
Difference between a Seq and a List in Scala
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In Java terms, Scala's Seq would be Java's List, and Scala's List would be Java's LinkedList.
Note that Seq is a trait, which is equivalent to Java's interface, but with the equivalent of up-and-coming defender methods. Scala's List is an abstract class that is extended by...
Correct way to find max in an Array in Swift
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Note in Swift 3 these have been renamed to simply min() and max().
– jemmons
Jul 10 '16 at 14:55
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Like Operator in Entity Framework?
...patterns. Our current approach is similar to what you mentioned, we would convert those queries into operations using contains, indexof, startswith, endswith, etc. I was just hoping that there was a more general-purpose solution.
– brien
Jun 23 '09 at 14:50
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