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How to check if an email address exists without sending an email?
...here are two methods you can sometimes use to determine if a recipient actually exists:
You can connect to the server, and issue a VRFY command. Very few servers support this command, but it is intended for exactly this. If the server responds with a 2.0.0 DSN, the user exists.
VRFY user
You can...
Try-catch speeding up my code?
... I’ve always wondered why the C# compiler generates so many extraneous locals. For example, new array initialisation expressions always generate a local, but is never necessary to generate a local. If it allows the JITter to produce measurably more performant code, perhaps the C# comp...
Eclipse cannot load SWT libraries
... I get an Unsatisfied Link Error and it will not open. I have recently installed the java JDK and Android SDK, could this be the problem? I followed this tutorial .
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How to change border color of textarea on :focus
...us as you are already using that class on the textarea. You get rid of the extra selector that way.
– Hoshts
Apr 22 '13 at 21:10
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Fixed point vs Floating point number
...ge numbers in the same way, but there is a small penalty in having to have extra storage for where the decimal place goes.
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libpng warning: iCCP: known incorrect sRGB profile
...geMagick's
convert in.png out.png
To remove the invalid iCCP chunk from all of the PNG files in a folder (directory), you can use mogrify from ImageMagick:
mogrify *.png
This requires that your ImageMagick was built with libpng16. You can easily check it by running:
convert -list format | gre...
git: How to ignore all present untracked files?
Is there a handy way to ignore all untracked files and folders in a git repository?
(I know about the .gitignore .)
8 An...
What's the difference between “static” and “static inline” function?
... to think that static should be used in translation units and benefit from extra check compiler does to find unused functions. And static inline should be used in header files to provide functions that can be in-lined (due to absence of external linkage) without issuing warnings.
Unfortunately I ca...
Time complexity of Euclid's Algorithm
... The base is the golden ratio obviously. Why? Because it takes exactly one extra step to compute nod(13,8) vs nod(8,5). For a fixed x if y<x the worst case performance is x=fib(n+1), y=fib(n). Here y depends on x, so we can look at x only.
– Stepan
Jul 27 '1...
How to call C from Swift?
Is there a way to call C routines from Swift?
6 Answers
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