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Re: Stupid mistakes I repeatedly make (map s///r)

by toolic (Bishop)
on Jan 26, 2011 at 02:34 UTC ( #884273=note: print w/replies, xml ) Need Help??


in reply to Stupid mistakes I repeatedly make

s/// at the end of a map()
Me too. And I'll probably continue to do it even after perl 5.14 is released. The new /r modifier was introduced in perl 5.13.2 perlop:
If the /r (non-destructive) option is used then it will perform the substitution on a copy of the string and return the copy whether or not a substitution occurred. The original string will always remain unchanged in this case. The copy will always be a plain string, even If the input is an object or a tied variable.
@foo = map { s/this/that/r } @bar # /r is very useful in maps

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[stevieb]: ...optionally displaying the results to a connected LCD with the dist name, date, time and commit of the last run along with a FAIL/PASS. Obviously I can't get CI with Travis for a RPi, so I built my own :) It'll take a couple of blog posts I think...
[stevieb]: ...to cover it all. Awesome thing is that you can dispatch ANY distribution to it (and include all revdeps if desired), and it works all the same as if I'm just testing the RPI code itself
[stevieb]: I'm rather pleased with myself and everything I've leared along this arduous and sometimes frustrating path
[stevieb]: Just need to implement an email plugin or something so I can get alerted remotely if the status of a build has changed from the last run
[stevieb]: Because of the extreme complexity of the testing code itself, I implemented extensive logging so I can troubleshoot much easier by setting a high debug level.
[stevieb]: if you're interested in the test/build backend, have a look at Test::BrewBuild.

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