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Validate uniqueness of multiple columns
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You can scope a validates_uniqueness_of call as follows.
validates_uniqueness_of :user_id, :s...
How to detect modifier key states in WPF?
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edited Apr 21 '11 at 23:16
answered Apr 21 '11 at 23:10
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Operation on every pair of element in a list
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Ben BlankBen Blank
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Using psql how do I list extensions installed in a database?
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edited Mar 26 '18 at 21:19
answered Feb 15 '14 at 16:04
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How to reference style attributes from a drawable?
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Thats i want . very simple and nice solution in < 21 SDK .
– Adnan Abdollah Zaki
Jan 3 '17 at 6:58
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Replace words in a string - Ruby
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edited Mar 1 '15 at 21:02
lucasarruda
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What's the difference of strings within single or double quotes in groovy?
.../GString keys in maps.
– Steven
Jul 21 '11 at 3:24
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How do I find the last occurrence of a substring in an NSString?
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answered Mar 13 '10 at 21:46
outisoutis
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git diff renamed file
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answered May 14 '15 at 21:32
benkcbenkc
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How to write multiple line string using Bash with variables?
... answered Oct 27 '15 at 4:26
Tk421Tk421
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