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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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How to declare a friend assembly?
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194
You need to sign both assemblies, because effectively both assemblies reference each other.
Y...
Haskell error parse error on input `='
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In GHCi 7.x or below, you need a let to define things in it.
Prelude> let f x = x * 2
Prel...
How do I completely uninstall Node.js, and reinstall from beginning (Mac OS X)
My version of node is always v0.6.1-pre even after I install brew node and NVM install v0.6.19.
28 Answers
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How to get CSS to select ID that begins with a string (not in Javascript)?
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edited Jun 30 '15 at 11:53
answered Jul 15 '12 at 23:58
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How can I profile C++ code running on Linux?
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Python dict how to create key or append an element to key?
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edited Sep 30 '14 at 22:31
answered Oct 16 '12 at 0:43
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Can table columns with a Foreign Key be NULL?
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251
Yes, you can enforce the constraint only when the value is not NULL. This can be easily tested w...
“Go To Definition” in Visual Studio only brings up the Metadata
I am working in a Web Project in Visual Studio 2008. When I hit F12 (or right-click and select Go To Definition) Visual Studio is consistently going to the Metadata file instead of going to the source.
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Adding a new SQL column with a default value
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