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Foreign keys in mongo?
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27
You may be interested in using a ORM like Mongoid or MongoMapper.
http://mongoid.org/docs/rela...
How to select date from datetime column?
I have a column of type "datetime" with values like 2009-10-20 10:00:00
8 Answers
8
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What does send() do in Ruby?
...argument).
Practically speaking, those lines are equivalent:
1.send '+', 2
1.+(2)
1 + 2
Note that send bypasses visibility checks, so that you can call private methods, too (useful for unit testing).
If there is really no variable before send, that means that the global Object is used:
send ...
How can I make Bootstrap columns all the same height?
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Skip a submodule during a Maven build
...s>
<module>module1</module>
<module>module2</module>
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</modules>
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<profiles>
<profile>
<id>ci</id>
<modules>
<module>module1</module>
<module>...
rails 3 validation on uniqueness on multiple attributes
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In Rails 2, I would have written:
validates_uniqueness_of :zipcode, :scope => :recorded_at
In Rails 3:
validates :zipcode, :uniqueness => {:scope => :recorded_at}
For multiple attributes:
validates :zipcode, :uniquenes...
Are there any downsides to enabling git rerere?
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edited Jun 20 at 9:12
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answered Apr 2 '11 at 5:59
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SQL select only rows with max value on a column [duplicate]
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27 Answers
27
Active
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Match linebreaks - \n or \r\n?
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231
Gonna answer in opposite direction.
2) For a full explanation about \r and \n I have to refer...
Input and output numpy arrays to h5py
... using h5py reduces the file size considerably. So, let's say I have the 2D numpy array named A . How do I save it to an h5py file?
Also, how do I read the same file and put it as a numpy array in a different code, as I need to do manipulations with the array?
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