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PostgreSQL: Difference between text and varchar (character varying)
...ength array).
Check this article from Depesz: http://www.depesz.com/index.php/2010/03/02/charx-vs-varcharx-vs-varchar-vs-text/
A couple of highlights:
To sum it all up:
char(n) – takes too much space when dealing with values shorter than n (pads them to n), and can lead to subtle err...
How to submit a form using PhantomJS
... require('webpage').create(),
server = 'http://posttestserver.com/post.php?dump',
data = 'universe=expanding&answer=42';
page.open(server, 'post', data, function (status) {
if (status !== 'success') {
console.log('Unable to post!');
} else {
console.log(page.cont...
Can you make just part of a regex case-insensitive?
...le uses in various languages (wrapping the matches with angle brackets):
php - preg_replace("~(?i:foo)|BAR~", '<$0>', "fooFOOfOoFoOBARBARbarbarbAr") (demo)
python - re.sub(r'(?i:foo)|BAR', r'<\g<0>>', 'fooFOOfOoFoOBARBARbarbarbAr') (demo) (note Python re supports inline modifier ...
Jump to matching XML tags in Vim
...lled matchit.vim . You can find it here: http://www.vim.org/scripts/script.php?script_id=39 . It was created pretty much the exact purpose you describe.
Install that, place your cursor on the body of the tag (not the <>, else it'll match those) and press % to jump to the other tag. See the sc...
How to send password securely over HTTP?
...nown algorithm, but it's quite slow for long keys. I don't know how fast a PHP or Javascript implementation of would be. But probably there are a faster algorithms.
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What is the !! (not not) operator in JavaScript?
...bject is truthy
!![] === true // an (empty) array is truthy; PHP programmers beware!
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Which is the fastest algorithm to find prime numbers?
...tp://primes.utm.edu/prove/prove2_3.html and http://forums.nvidia.com/index.php?showtopic=70483
If you just need a way to generate very big prime numbers and don't care to generate all prime numbers < an integer n, you can use Lucas-Lehmer test to verify Mersenne prime numbers. A Mersenne prime n...
Linux bash: Multiple variable assignment
Does exist in linux bash something similar to the following code in PHP:
5 Answers
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Has reCaptcha been cracked / hacked / OCR'd / defeated / broken? [closed]
...nd the version become paid now, check this bypasscaptcha.com/captchakiller.php
– MarmiK
Sep 6 '13 at 10:38
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multiple definition of template specialization when using different objects
...ss, they will still work without the inline? For example: pastebin.com/raw.php?i=bRaiNC7M. I took that class and included it in two files. Wouldn't this have" the same effect as if you'd written the contents" directly into the two files and thus there will be a multiple definition error?
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