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Why historically do people use 255 not 256 for database field magnitudes?
...onstrained otherwise). Most systems treat such an empty string as distinct from NULL, but some systems (notably Oracle) treat an empty string identically to NULL. For systems where an empty string is not NULL, an additional bit somewhere in the row would be needed to indicate whether the value shoul...
PHP YAML Parsers [closed]
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There are other lesser known libraries (like this one, from the Horde project), but I didn't want to delve much into these.
– NullUserException
Sep 11 '10 at 16:47
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How do I declare an array of weak references in Swift?
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How do you remove the wrapper objects from the array when their value is deallocated?
– Sulthan
Jun 9 '14 at 20:09
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curl_exec() always returns false
...some module to communicate with an API and while copying the link directly from the manual, for some odd reason, the hyphen from the copied link was in a different encoding and hence the curl_exec() was always returning false because it was unable to communicate with the server.
It took me a coup...
Anonymous recursive PHP functions
...ght not be a simple approach, but I learned about a technique called "fix" from functional languages. The fix function from Haskell is known more generally as the Y combinator, which is one of the most well-known fixed point combinators.
A fixed point is a value that is unchanged by a function: a ...
iPhone app in landscape mode, 2008 systems
Please note that this question is from 2008 and now is of only historic interest.
8 Answers
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How to get start and end of day in Javascript?
...UTCString() + ':' + end.toUTCString() );
If you need to get the UTC time from those, you can use UTC().
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How is Generic Covariance & Contra-variance Implemented in C# 4.0?
... hurt type safety at all, but lets you return an IEnumerable<string> from a method declared to return IEnumerable<object> for instance.
Contravariance is harder to give concrete examples for using interfaces, but it's easy with a delegate. Consider Action<T> - that just represents...
Recommended way to save uploaded files in a servlet application
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}
Or, when you want to autogenerate an unique file name to prevent users from overwriting existing files with coincidentally the same name:
File file = File.createTempFile("somefilename-", ".ext", uploads);
try (InputStream input = part.getInputStream()) {
Files.copy(input, file.toPath(), Sta...
Get current batchfile directory
...at with the following contents
set mypath=%cd%
@echo %mypath%
Pause
run from the directory g:\test\bat will echo that path in the DOS command window.
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