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How to write a Ruby switch statement (case…when) with regex and backreferences?
... groups are always stored in pseudo variables $1 to $9:
case foo
when /^([0-9][0-9])/
print "the month is #{$1}"
else
print "something else"
end
You can also use the $LAST_MATCH_INFO pseudo variable to get at the whole MatchData object. This can be useful when using named captures:
case ...
Why does changing the sum order returns a different result?
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+500
Maybe this question is stupid, but why does simply changing the order of the elements affects the result?
It will change the poi...
What is the best way to test for an empty string in Go?
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10 Answers
10
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How to round float numbers in javascript?
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davindavin
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SQL how to increase or decrease one for a int column in one command
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answered Jun 10 '09 at 2:01
gahooagahooa
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Ruby replace string with captured regex pattern
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edited Feb 12 '15 at 13:10
Jake Berger
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answered ...
An error occurred while installing pg (0.17.1), and Bundler cannot continue
I just installed Rails 4.0.2 and when creating a new app, in the bundle stage I get:
16 Answers
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How is this fibonacci-function memoized?
... and kept ready in case it is asked for again. If we define some list, xs=[0..] and later ask for its 100th element, xs!!99, the 100th slot in the list gets "fleshed out", holding the number 99 now, ready for next access.
That is what that trick, "going-through-a-list", is exploiting. In normal do...
How can I check the size of a collection within a Django template?
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MichielB
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answered May 23 '09 at 17:53
Alex MartelliAlex Mar...
Run Cron job every N minutes plus offset
*/20 * * * *
3 Answers
3
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