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How big should a UIBarButtonItem image be?
...f you're working on iOS apps!)
That would translate to images 25px square for older devices like iPad 2 / Mini, 50px square for most current devices like iPhone 8 or iPad, and 75px square for Retina HD devices (the iPhone 6/7/8 Plus, or iPhone X). Asset catalogs will help immensely in keeping the d...
In-place edits with sed on OS X
...e right I was omitting the extension after the -i flag. Is -i'' dangerous for any reason other than potentially messing up the original file (and having no back-up)?
– SundayMonday
Sep 27 '11 at 17:48
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MySQL: how to get the difference between two timestamps in seconds
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+1 for the performance explanation. I wasn't using UNIX_TIMESTAMP() because I thought it would take more time.
– elcool
Apr 22 '11 at 18:14
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How to check if an intent can be handled from some activity?
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edwardxu's solution works perfectly for me.
Just to clarify a bit:
PackageManager packageManager = getActivity().getPackageManager();
if (intent.resolveActivity(packageManager) != null) {
startActivity(intent);
} else {
Log.d(TAG, "No Intent available...
python numpy machine epsilon
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An easier way to get the machine epsilon for a given float type is to use np.finfo():
print(np.finfo(float).eps)
# 2.22044604925e-16
print(np.finfo(np.float32).eps)
# 1.19209e-07
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How to change variables value while debugging with LLDB in Xcode?
...[-u ] -- expression [-o] [-d
] [-u ] -- expression
-G <gdb-format> ( --gdb-format <gdb-format> )
Specify a format using a GDB format specifier string.
-d <boolean> ( --dynamic-value <boolean> )
Upcast the value resulting from the expression ...
What will happen if I modify a Python script while it's running?
...htly misleading explanation, because line X may have different code than before you started the script.
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Intellij IDEA show javadoc automatically
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Thanks for contributing an answer to Stack Overflow!Please be sure to answer the question. Provide details and share your research!But avoid …Asking for help, clarification, or responding to other answers.Making statements based o...
How do I get the function name inside a function in PHP?
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FUNCTION works for non-class functions as well. Tried on PHP 7.0.8.
– mvsagar
Jul 21 '17 at 13:58
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How to permanently export a variable in Linux?
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@kostja For all new shells ? If I have eclipse running before I change those env variables and I want eclipse to have changed vars, do I have to restart eclipse ?
– Bitterblue
Nov 28 '13 at 9:39...