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How to pull a random record using Django's ORM?
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Emil IvanovEmil Ivanov
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Validating IPv4 addresses with regexp
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answered Mar 12 '11 at 18:08
Mark ByersMark Byers
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Select second last element with css
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edited Feb 15 '18 at 16:18
Kos
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iTerm2 keyboard shortcut - split pane navigation
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lucasoldaini
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answered Feb 12 '12 at 3:47
Michael BerkowskiMichael Berkowski
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What does the “>” (greater-than sign) CSS selector mean?
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8 Answers
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Numbering rows within groups in a data frame
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284
Use ave, ddply, dplyr or data.table:
df$num <- ave(df$val, df$cat, FUN = seq_along)
or:
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Explain the “setUp” and “tearDown” Python methods used in test cases
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86
In general you add all prerequisite steps to setUp and all clean-up steps to tearDown.
You can...
AngularJS $resource RESTful example
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edited Jul 8 '16 at 10:12
T J
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Git merge master into feature branch
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edited Oct 29 '19 at 18:01
Peter Mortensen
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Why escape_javascript before rendering a partial?
...pt code?
– berto77
Feb 22 '12 at 3:38
Yeah, actually it's more of a formatting method. It doesn't prevent users from e...