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What does “coalgebra” mean in the context of programming?
I have heard the term "coalgebras" several times in functional programming and PLT circles, especially when the discussion is about objects, comonads, lenses, and such. Googling this term gives pages that give mathematical description of these structures which is pretty much incomprehensible to me. ...
How to do a regular expression replace in MySQL?
... expression specified by the pattern pat with the replacement string repl, and returns the resulting string. If expr, pat, or repl is NULL, the return value is NULL.
and Regular expression support:
Previously, MySQL used the Henry Spencer regular expression library to support regular expression op...
psql: FATAL: role “postgres” does not exist
...ep is to check the missing role: What is the output within psql of the command \du ? On my Ubuntu system the relevant line looks like this:
List of roles
Role name | Attributes | Member of
-----------+-----------------------------------+-------...
How to customize an end time for a YouTube video?
... to return a Flash/SWF stream... Which works fine for me on Chrome/Windows and IE, but not on Firefox.
– Kai Carver
Sep 16 '14 at 11:03
3
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Optional Parameters in Go?
...optional parameters? Or can I just define two functions with the same name and a different number of arguments?
12 Answers
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Elegant solution to duplicate, const and non-const, getters? [duplicate]
...e member function calling it is non-const, the object itself is non-const, and casting away the const is allowed.
class Foo
{
public:
const int& get() const
{
//non-trivial work
return foo;
}
int& get()
{
return const_cast<int&>(const_c...
C++0x has no semaphores? How to synchronize threads?
...
You can easily build one from a mutex and a condition variable:
#include <mutex>
#include <condition_variable>
class semaphore
{
private:
std::mutex mutex_;
std::condition_variable condition_;
unsigned long count_ = 0; // Initialized as ...
Remove accents/diacritics in a string in JavaScript
... is now trivial to globally get rid of the diacritics, which the Unicode standard conveniently groups as the Combining Diacritical Marks Unicode block.
See comment for performance testing.
Alternatively, if you just want sorting
Intl.Collator has sufficient support ~95% right now, a polyfill is als...
Can you nest html forms?
...th tabs, each tab is its own form (so you can submit it to save progress), and they're all wrapped in a form, which you can submit to save everything. Makes sense to me.
– Rob Grant
Dec 24 '13 at 6:45
...
How do you prevent install of “devDependencies” NPM modules for Node.js (package.json)?
...
The npm install command will install the devDependencies along other dependencies when run inside a package directory, in a development environment (the default).
Use npm install --only=prod (or --only=production) to install only dependencies, ...