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Why does scanf() need “%lf” for doubles, when printf() is okay with just “%f”?
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Since С99 the matching between format specifiers and floating-point argument types in C is consistent between printf and scanf. It is
%f for float
%lf for double
%Lf for long double
It just so happens that when arguments of type float are passed as variadic parameters,...
How can I wait for a thread to finish with .NET?
...your UI thread, however you get a Timeout built in for you.
2. Use a WaitHandle
ManualResetEvent is a WaitHandle as jrista suggested.
One thing to note is if you want to wait for multiple threads: WaitHandle.WaitAll() won't work by default, as it needs an MTA thread. You can get around this by mark...
Submit form on pressing Enter with AngularJS
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Just leaving a note: If you've ended up here and submit buttons don't work for you, you could be using a bad name for your submit function. I was foolishly using ng-submit="join()" for a registration controller that had $scope.join = function() {...} and changing that f...
In a Bash script, how can I exit the entire script if a certain condition occurs?
...oniLeigh If it's closing the "window" likely you're putting the exit # command inside a function, not a script. (In which case use return # instead.)
– Jamie
Jan 6 at 20:27
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Java equivalents of C# String.Format() and String.Join()
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More precisely: StringBuffer for jdk1.4 and below, StringBuilder for jdk1.5 and after, since the latter is not synchronized, hence a little faster.
– VonC
Oct 9 '08 at 15:39
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What is the purpose of the : (colon) GNU Bash builtin?
What is the purpose of a command that does nothing, being little more than a comment leader, but is actually a shell builtin in and of itself?
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Deleting an element from an array in PHP
...n use unset() or alternatively \array_splice().
Also if you have the value and don't know the key to delete the element you can use \array_search() to get the key.
unset()
Note that when you use unset() the array keys won't change/reindex. If you want to reindex the keys you can use \array_values() ...
Why does z-index not work?
So if I understand z-index correctly, it would be perfect in this situation:
4 Answers
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Argparse: Required argument 'y' if 'x' is present
...ts of options.
The simplest way to deal with this would be:
if args.prox and (args.lport is None or args.rport is None):
parser.error("--prox requires --lport and --rport.")
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How to prevent ajax requests to follow redirects using jQuery
...r question interesting, but the problem in whole seems me more a misunderstanding. At least I'll try to explain my understanding of the problem.
The silent (transparent) redirection is the part of XMLHttpRequest specification (see here especially the words "... transparently follow the redirect ......