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Fastest way to check if string contains only digits
... testing (always profile because the results depend on hardware, versions, order, etc.):
static bool isDigitsFr(string s) { if (s == null || s == "") return false; for (int i = 0; i < s.Length; i++) if (s[i] < '0' || s[i] > '9') return false; return true; }
static bool isDigitsFu(string s)...
Get child node index
...????????
I hypothesize that given an element where all of its children are ordered on the document sequentially, the fastest way should be to do a binary search, comparing the document positions of the elements. However, as introduced in the conclusion the hypothesis is rejected. The more elements y...
How do you implement a class in C? [closed]
...se C (no C++ or object oriented compilers) and I don't have dynamic memory allocation, what are some techniques I can use to implement a class, or a good approximation of a class? Is it always a good idea to isolate the "class" to a separate file? Assume that we can preallocate the memory by assumin...
How do I determine if my python shell is executing in 32bit or 64bit?
...test for older systems, this slightly more complicated test should work on all Python 2 and 3 releases:
$ python-32 -c 'import struct;print( 8 * struct.calcsize("P"))'
32
$ python-64 -c 'import struct;print( 8 * struct.calcsize("P"))'
64
BTW, you might be tempted to use platform.architecture() fo...
ASP.NET MVC Performance
.... https://weblogs.asp.net/infinitiesloop/truly-understanding-viewstate
In order to make a valid comparison between MVC and WebForms we need to be sure that both apps are using the architectures correctly.
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How can I determine what font a browser is actually using to render some text?
...ection. Expanding the font-family attribute as it appears (in alphabetical order) will not display which font is being loaded. This information appears at the bottom.
– Merchako
Dec 30 '15 at 0:39
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How do I erase an element from std::vector by index?
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If you have an unordered vector you can take advantage of the fact that it's unordered and use something I saw from Dan Higgins at CPPCON
template< typename TContainer >
static bool EraseFromUnorderedByIndex( TContainer& inContaine...
Execute unit tests serially (rather than in parallel)
...gt; Add to playlist -> New playlist
then you can specify the execution order, the default is, as you add them to the play list but you can change the playlist file as you want
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presentViewController:animated:YES view will not appear until user taps again
...ith presentViewController:animated:completion . What I'm making is essentially a guessing game.
8 Answers
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How to call a method after a delay in Android
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You should keep a reference to your timer in order to cancel it when it's not needed anymore since according to the Android doc: "When a timer is no longer needed, users should call cancel(), which releases the timer's thread and other resources. Timers not explicitly c...