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Storing a Map using JPA
...nnotations to persist the attributes map in the following class using JPA2
2 Answers
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Active Record - Find records which were created_at before today
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Using ActiveRecord the standard way:
MyModel.where("created_at < ?", 2.days.ago)
Using the underlying Arel interface:
MyModel.where(MyModel.arel_table[:created_at].lt(2.days.ago))
Using a thin layer over Arel:
MyModel.where(MyModel[:created_at] < 2.days.ago)
Using squeel:
MyModel.w...
composer: How to find the exact version of a package?
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edited Nov 21 '16 at 18:09
L S
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an...
How to drive C#, C++ or Java compiler to compute 1+2+3+…+1000 at compile time?
...ed a really strange question. The interviewer asked me how can I compute 1+2+3+...+1000 just using compiler features. This means that I am not allowed to write a program and execute it, but I should just write a program that could drive the compiler to compute this sum while compilation and print th...
php static function
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edited Dec 20 '14 at 3:01
Makyen♦
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Convert Python dictionary to JSON array
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answered Feb 2 '13 at 10:50
kmerenkovkmerenkov
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Using sed, how do you print the first 'N' characters of a line?
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211
Don't use sed, use cut:
grep .... | cut -c 1-N
If you MUST use sed:
grep ... | sed -e 's/^...
PostgreSQL disable more output
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251
To disable pagination but retain the output, use:
\pset pager off
To remember this setting,...
Google access token expiration time
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The spec says seconds:
http://tools.ietf.org/html/draft-ietf-oauth-v2-22#section-4.2.2
expires_in
OPTIONAL. The lifetime in seconds of the access token. For
example, the value "3600" denotes that the access token will
expire in one hour from the time the response was generated....