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Rails: how do I validate that something is a boolean?
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edited Jul 18 '16 at 8:15
Luca Spiller
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How to sort the result from string_agg()
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With postgres 9.0+ you can write:
select string_agg(product,' | ' order by product) from "tblpr...
How do I use CMake?
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answered Oct 22 '11 at 12:58
holtavoltholtavolt
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Forward declaration of nested types/classes in C++
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answered Jun 4 '09 at 15:23
Adam RosenfieldAdam Rosenfield
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How can I convert a PFX certificate file for use with Apache on a linux server?
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With OpenSSL you can convert pfx to Apache compatible format with next commands:
openssl pkcs...
Default behavior of “git push” without a branch specified
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Difference of Maven JAXB plugins
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Let's summarize. We have:
the maven-jaxb2-plugin (https://github.com/highsource/maven-jaxb2-...
What is the difference between t.belongs_to and t.references in rails?
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SQLAlchemy: What's the difference between flush() and commit()?
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flush() is always called as part of a call to commit() (1).
When you use a Session object to query the database, the query will return results both from the database and from the flushed parts of the uncommitted transaction it holds. By default, Session objects autoflush their op...
LINQ order by null column where order is ascending and nulls should be last
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10 Answers
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