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How to create the most compact mapping n → isprime(n) up to a limit N?
... is of form 6k - 1 or 6k + 1 and looks only at divisors of this form.
Sometimes, If I really want speed and the range is limited, I implement a pseudo-prime test based on Fermat's little theorem. If I really want more speed (i.e. avoid O(sqrt(N)) algorithm altogether), I precompute the false positi...
Most efficient way to concatenate strings?
...s, use either the @ string literal or the inline + operator.
Most of the time StringBuilder is your best bet, but there are cases as shown in that post that you should at least think about each situation.
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Could not find any resources appropriate for the specified culture or the neutral culture
... this was the answer I was looking for. Sadly it doesn't appear at compile time :-( Thanks
– noob
Jan 11 '14 at 21:16
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How do I directly modify a Google Chrome Extension File? (.CRX)
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@o_O - This has been a long time coming, but... here ya go: macworld.com/article/2057221/…
– jenming
Feb 15 '17 at 20:07
add a...
Extract hostname name from string
... Don't use this if you need to do it fast. It's about 40-60 times slower than gilly3's method. Tested in jsperf: jsperf.com/hostname-from-url.
– cprcrack
Nov 5 '13 at 19:42
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Passing $_POST values with cURL
...ELDS, http_build_query($data));
I hope this will help others save their time.
See:
curl_init
curl_setopt
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How to remove all .svn directories from my application directories
...ccept. Thus, if you had a million files, it might run rm 1,000,000/65,000 times (if your shell could accept 65,002 arguments on the command line {65k files + 1 for rm + 1 for -fr}).
As persons have adeptly pointed out, the following also work:
find . -name .svn -exec rm -rf {} \;
find . -depth -n...
postgresql port confusion 5433 or 5432?
...d connecting with the psql that shipped with the OS. Not only do these sometimes have different default ports, but the Pg that shipped with Mac OS X has a different default unix socket path, so even if the server is running on the same port it won't be listening to the same unix socket.
Most Mac u...
Is the sizeof(some pointer) always equal to four?
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@LưuVĩnhPhúc It’s been a long time that I’ve done assembly on anything 32 bit. The part I seem to remember is that you can save space for pointers pointing near to the code you have. Also, not all 32 bit architectures – certainly not all based on the ...
How to convert IPython notebooks to PDF and HTML?
...pdf/sphinx export and is the expert to generate PDF from ipynb file at the time of this writing.
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