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rails 3 validation on uniqueness on multiple attributes
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edited Aug 15 '14 at 14:15
Jason Swett
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Rails where condition using NOT NIL
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516
The canonical way to do this with Rails 3:
Foo.includes(:bar).where("bars.id IS NOT NULL")
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CSS: how to position element in lower right?
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answered Oct 18 '10 at 1:21
Austin HydeAustin Hyde
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How do I create a SHA1 hash in ruby?
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require 'digest/sha1'
Digest::SHA1.hexdigest 'foo'
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Foreign Key to multiple tables
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154
You have a few options, all varying in "correctness" and ease of use. As always, the right des...
How do I get current URL in Selenium Webdriver 2 Python?
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edited Aug 18 at 8:17
Suyash
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answered Apr 13 '13 at 8...
Is inject the same thing as reduce in ruby?
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161
Yes, and it's also called fold in many other programming languages and in Mathematics. Ruby al...
convert from Color to brush
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This is for Color to Brush....
you can't convert it, you have to make a new brush....
SolidC...
How to set the maximum memory usage for JVM?
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edited Feb 27 '14 at 15:23
Erik Kaplun
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How do I capture bash output to the Mac OS X clipboard?
...You can use both together to filter content on the clipboard - here's a rot13:
pbpaste | tr 'a-zA-Z' 'n-za-mN-ZA-M' | pbcopy
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