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HSL to RGB color conversion
... CSS 3 specification, which reads:
HOW TO RETURN hsl.to.rgb(h, s, l):
SELECT:
l<=0.5: PUT l*(s+1) IN m2
ELSE: PUT l+s-l*s IN m2
PUT l*2-m2 IN m1
PUT hue.to.rgb(m1, m2, h+1/3) IN r
PUT hue.to.rgb(m1, m2, h ) IN g
PUT hue.to.rgb(m1, m2, h-1/3) IN b
RETURN (r, g, ...
Confused about stdin, stdout and stderr?
...se the same library functions and interfaces (printf,
scanf, read, write, select, etc.) without worrying about whether the I/O stream
is connected to a keyboard, a disk file, a socket, a pipe, or some other I/O abstraction.
Most programs need to read input, write output, and log errors, so stdi...
AVAudioPlayer throws breakpoint in debug mode
...Breakpoint navigator in Xcode.
Control-click on the 'All Exceptions' line.
Select the 'Edit Breakpoint...' option.
Change the Exception from All to Objective-C.
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How can I pass a parameter to a setTimeout() callback?
...
I'm not sure why this answer wasn't selected as the best. Using an anonymous function works, sure, but if you can simply pass a third parameter into the original setTimeout function call... why not?
– Kris Schouw
Sep 21 '1...
How to get the source directory of a Bash script from within the script itself?
...e you locate this at start of the script.
This comment and code Copyleft, selectable license under the GPL2.0 or later or CC-SA 3.0 (CreativeCommons Share Alike) or later. (c) 2008. All rights reserved. No warranty of any kind. You have been warned.
http://www.gnu.org/licenses/gpl-2.0.txt
http://c...
Postgres unique constraint vs index
...ead access to the table.
Adding a constraint does put a table lock (so all selects are blocked) since it is added via ALTER TABLE.
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App Inventor 2 CustomWebView 拓展：高级版Web浏览器，完美浏览现代Web前...
...ebView loads pages in overview mode
LongClickable
Returns whether text selection and context menu are enabled or not
OverScrollMode
Gets over scroll mode
PromptForPermission
Sets whether webview will prompt for permission and raise ‘OnPermissionRequest’ event or not else assume permi...
The differences between .build, .create, and .create! and when should they be used?
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I'm selected this one as the most correct answer because of the mention on being able to link the associated models with them - that's an interesting and important difference I think over using .new and .save. Which takes a littl...
Disabled href tag
...doesn't have a disabled attribute, that's just for <input>s (and <select>s and <textarea>s).
To "disable" a link, you can remove its href attribute, or add a click handler that returns false.
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Most tricky/useful commands for gdb debugger [closed]
...n it in reverse
* reverse-finish -- Execute backward until just before the selected stack frame is called
* reverse-next ('rn') -- Step program backward, proceeding through subroutine calls.
* reverse-nexti ('rni') -- Step backward one instruction, but proceed through called subroutines.
* reverse-s...