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Re: Array Filter and Lookahead

by moritz (Cardinal)
on Nov 20, 2012 at 19:06 UTC ( #1004778=note: print w/replies, xml ) Need Help??

in reply to Array Filter and Lookahead

If you really want the last integer in a string, you can find that as /.*(?<!\d)(\d+)/, and get the numbers as

my @filtered = map { /.*(?<!\d)(\d+)/; $1 // '' } @lines;

However you seem to want to turn 3.0 into 3 (and not 0), and I don't know the rules behind that. Do you want to permit decimals, and cut off zero-decimals behind the dot? Or something else?

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Re^2: Array Filter and Lookahead
by AnomalousMonk (Chancellor) on Nov 20, 2012 at 20:00 UTC
    >perl -wMstrict -le "my @lines = ('xx', '0 xx', '1 xx 3.2'); ;; 'Zonk' =~ m{ (\w+) }xms; ;; my @filtered = map { /.*(?<!\d)(\d+)/; $1 // '' } @lines; printf qq{'$_' } for @filtered; " 'Zonk' '0' '2'
Re^2: Array Filter and Lookahead
by daugh016 (Initiate) on Nov 20, 2012 at 21:00 UTC
    Thanks for the feedback! The numbers are actually section numbers so sometimes they are written "section 1" and sometimes it could be "section 1.", "section 1)", "section 1.)", etc.

      So what's the extraction rule? One can make a guess based on the examples just given, but an explicit definition is always nice to have.

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