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rails 3 validation on uniqueness on multiple attributes
I use Rails 3.0.0.beta4
3 Answers
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Pelican 3.3 pelican-quickstart error “ValueError: unknown locale: UTF-8”
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You could try a solution posted here or here. Basically, add some lines to your ~/.bash_profi...
Best way to find the intersection of multiple sets?
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From Python version 2.6 on you can use multiple arguments to set.intersection(), like
u = set...
how to get first three characters of an NSString?
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edited Jan 30 '14 at 15:39
answered Mar 14 '11 at 4:10
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How to swap keys and values in a hash
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edited Jan 14 at 0:20
the Tin Man
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How to get one value at a time from a generator function in Python?
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– Ignacio Vazquez-Abrams
Mar 31 '18 at 3:04
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@CharlieParker You must be using Python 3!
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Initializing a member array in constructor initializer
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edited Oct 30 '10 at 9:44
answered Oct 30 '10 at 9:33
Jo...
How to express infinity in Ruby?
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Dorian
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answered Apr 25 '11 at 12:31
MattMatt
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What's the difference between RANK() and DENSE_RANK() functions in oracle?
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RANK gives you the ranking within your ordered partition. Ties are assigned the same rank, with...
Is it intended by the C++ standards committee that in C++11 unordered_map destroys what it inserts?
...s behaviour occurs in very recent compilers only: I found that clang 3.2-3.4 and GCC 4.8 are the only compilers to demonstrate this "feature".
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