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regex for zip-code
...4})?$
^ = Start of the string.
\d{5} = Match 5 digits (for condition 1, 2, 3)
(?:…) = Grouping
[-\s] = Match a space (for condition 3) or a hyphen (for condition 2)
\d{4} = Match 4 digits (for condition 2, 3)
…? = The pattern before it is optional (for condition 1)
$ = End of the string.
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What does the (unary) * operator do in this Ruby code?
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271
The * is the splat operator.
It expands an Array into a list of arguments, in this case a lis...
Strange, unexpected behavior (disappearing/changing values) when using Hash default value, e.g. Hash
...s in the array, despite h[1] still giving us a value? Here’s a hint:
h[42] #=> ["a", "b"]
The array returned by each [] call is just the default value, which we’ve been mutating all this time so now contains our new values. Since << doesn’t assign to the hash (there can never be a...
Where does Jenkins store configuration files for the jobs it runs?
I'm adding continuous integration to an EC2 project at work using Jenkins. The Jenkins machine itself is kept on an EC2 machine - one that might need to be taken offline and brought back on an entirely different EC2 instance at any point. We have a bunch of Puppet manifests allowing us to easily rei...
How can I use Bash syntax in Makefile targets?
...ul, e.g. process substitution like in diff <(sort file1) <(sort file2) .
6 Answers
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What is :: (double colon) in Python when subscripting sequences?
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257
it means 'nothing for the first argument, nothing for the second, and jump by three'. It gets ...
How to alias a table in Laravel Eloquent queries (or using Query Builder)?
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224
Laravel supports aliases on tables and columns with AS. Try
$users = DB::table('really_long_t...
How to change the default font size in ggplot2
...like to know if it is possible to change some default parameters of ggplot2 graphics, like font size for instance, for a whole R session. The idea is to avoid setting them for each plot.
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Turn Pandas Multi-Index into column
I have a dataframe with 2 index levels:
3 Answers
3
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Finding child element of parent pure javascript
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jmargolisvt
4,18144 gold badges2121 silver badges3434 bronze badges
answered Apr 30 '13 at 14:15
Rick ViscomiRick Viscomi
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