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Why does PostgreSQL perform sequential scan on indexed column?
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What is the difference between persist() and merge() in JPA and Hibernate?
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Devise form within a different controller
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As Andres says, the form calls helpers which are specified by Devise and so aren't present when...
Java system properties and environment variables
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informatik01
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answered Aug 14 '11 at 4:30
Jake DempseyJake...
What's the point of the X-Requested-With header?
...rer check:
This defense technique is specifically discussed in section 4.3 of
Robust Defenses for Cross-Site Request Forgery. However, bypasses of
this defense using Flash were documented as early as 2008 and again as
recently as 2015 by Mathias Karlsson to exploit a CSRF flaw in Vimeo.
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Why is LINQ JOIN so much faster than linking with WHERE?
...Where condition is evaluated for each combination of rows (n1 * n2 * n3 * n4)
The Join operator takes the rows from the first tables, then takes only the rows with a matching key from the second table, then only the rows with a matching key from the third table, and so on. This is much more efficien...
How to rollback just one step using rake db:migrate
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edited Jul 22 '14 at 15:58
answered Dec 4 '10 at 9:43
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Do python projects need a MANIFEST.in, and what should be in it?
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edited Jul 14 '16 at 12:01
Flimm
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How to use enum values in f:selectItem(s)
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