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Formula to determine brightness of RGB color
...ightness? Luminance?
Luminance (standard for certain colour spaces): (0.2126*R + 0.7152*G + 0.0722*B) [1]
Luminance (perceived option 1): (0.299*R + 0.587*G + 0.114*B) [2]
Luminance (perceived option 2, slower to calculate): sqrt( 0.241*R^2 + 0.691*G^2 + 0.068*B^2 ) → sqrt( 0.299*R^2 + 0.587*G^...
How to replace a hash key with another key
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answered Oct 10 '13 at 14:22
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How to identify numpy types in python?
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116
Use the builtin type function to get the type, then you can use the __module__ property to fin...
Installing Latest version of git in ubuntu
My Current git version 1.7.9.5...
5 Answers
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Count number of days between two dates
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10 Answers
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How to parse JSON in Python?
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Very simple:
import json
data = json.loads('{"one" : "1", "two" : "2", "three" : "3"}')
print data['two']
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Set operations (union, intersection) on Swift array?
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186
Yes, Swift has the Set class.
let array1 = ["a", "b", "c"]
let array2 = ["a", "b", "d"]
let ...
Does Ruby have a string.startswith(“abc”) built in method?
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edited Jun 20 at 9:12
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answered Nov 9 '10 at 4:48
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Comparing arrays in JUnit assertions, concise built-in way?
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edited Dec 12 '11 at 19:46
answered Nov 19 '10 at 19:06
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Browsers' default CSS for HTML elements
...of all W3C HTML spec and vendor default CSS stylesheets can be found here
1. Default Styles for Firefox
2. Default Styles for Internet Explorer
3. Default Styles for Chrome / Webkit
4. Default Styles for Opera
5. Default Styles for HTML4 (W3C spec)
6. Default Styles for HTML5 (W3C spec)
Sampl...