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How do MySQL indexes work?
...so create an integer field called url_hash and use a hash function like CRC32 or any other hash function to hash the url when inserting it. And then, when you need to query for this value, you can do something like this:
SELECT url FROM url_table WHERE url_hash=CRC32("http://gnu.org");
The proble...
Subtract days from a date in JavaScript
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32 Answers
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Can someone explain the dollar sign in Javascript?
...ction(){}.
– F-3000
Dec 7 '13 at 12:32
24
Thimmayya your comment "By default, jQuery uses "$" as ...
PHP: How to generate a random, unique, alphanumeric string for use in a secret link?
...: http://us1.php.net/manual/en/function.openssl-random-pseudo-bytes.php#104322
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How can I generate an MD5 hash?
....toString(16);
// Now we need to zero pad it if you actually want the full 32 chars.
while(hashtext.length() < 32 ){
hashtext = "0"+hashtext;
}
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How to get the number of characters in a std::string?
...u can handle rolling your own strlen as well. For wstring, u16string and u32string, it returns the number of characters, rather than bytes. (Again with the proviso that if you are using a variable-length encoding in any of those, you're going to have to roll your own strlen).
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Convert a binary NodeJS Buffer to JavaScript ArrayBuffer
...ing integers when possible using DataView. Until size&0xfffffffe, copy 32-bit integers, then, if there's 1 byte remaining, copy 8-bit integer, if 2 bytes, copy 16-bit integer, and if 3 bytes, copy 16-bit and 8-bit integer.
– Triang3l
Feb 13 '13 at 17:25
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JavaScript property access: dot notation vs. brackets?
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– Aron Rotteveel
Feb 11 '11 at 11:32
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Why do we copy then move?
... Yakk - Adam NevraumontYakk - Adam Nevraumont
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How to access a dictionary element in a Django template?
...wice.
– Conrad.Dean
May 7 '11 at 16:32
5
While it does work, it's not very efficient. It is doing...