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How do I convert a Ruby class name to a underscore-delimited symbol?
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how to do the reverse?
– user1406062
May 26 '13 at 8:39
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Git diff to show only lines that have been modified
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What you want is a diff with 0 lines of context. You can generate this with:
git diff --unified=0
or
git diff -U0
You can also set this as a config option for that repository:
git config diff.context 0
To have it set globally, for any repository...
What is the most efficient way to store tags in a database?
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answered Dec 2 '08 at 15:05
Simon ScarfeSimon Scarfe
8,10833 gold badges2525 silver badges3131 bronze badges
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How do I use Node.js Crypto to create a HMAC-SHA1 hash?
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answered Sep 20 '11 at 4:38
Ricardo TomasiRicardo Tomasi
30.3k22 gold badges5050 silver badges6565 bronze badges
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quick random row selection in Postgres
...or(random()*N) LIMIT 1;
Consider a table of 2 rows; random()*N generates 0 <= x < 2 and for example SELECT myid FROM mytable OFFSET 1.7 LIMIT 1; returns 0 rows because of implicit rounding to nearest int.
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How to write iOS app purely in C
...c_msgSend(self->window, sel_getUid("initWithFrame:"), (struct CGRect) { 0, 0, 320, 480 });
// here, we are creating our view controller, and our view. note the use of objc_getClass, because we cannot reference UIViewController directly in C.
id viewController = objc_msgSend(objc_msgSend(...
How do I test an AngularJS service with Jasmine?
...oper way'
– LeeGee
Jan 15 '16 at 9:50
2
@LeeGee I think we can call it the 'proper' way because i...
How to select Python version in PyCharm?
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edited Dec 30 '14 at 21:56
Eric Leschinski
114k4949 gold badges368368 silver badges313313 bronze badges
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What exactly is Heroku?
...n tutorial which allows you to start in minutes. Also they provide first 750 computation hours free of charge which means you can have one processes (aka Dyno) at no cost. Also performance is very good e.g. simple web application written in node.js can handle around 60 - 70 requests per second.
Her...
Re-entrant locks in C#
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No, not as long as you are locking on the same object. The recursive code effectively already h...