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Re: upto match please, my one-lina!!

by ioannis (Abbot)
on Jun 09, 2006 at 03:32 UTC ( #554412=note: print w/replies, xml ) Need Help??

in reply to upto match please, my one-lina!!

So it can run also under use strict:

perl -Mstrict \ -ne'/regex(?{print @@; exit})/;' \ -e'shift(@@) if push(@@,$_)>5' file

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Re^2: upto match please, my one-lina!!
by NetWallah (Canon) on Jun 09, 2006 at 04:39 UTC
    Loved the clever use of the return value from push, ioannis (++). The 'experimental' regex feature, however, got me thinking if it could be done with regular features only, so - here is the slightly ugly, but short:
    perl -ne "m/foo/ and die @@ ; shift(@@) if push(@@,$_)>5" myfile.txt
    I used "die" because (without eval), the "print @@, exit" combo printed nothing in my code (but it works as advertised in ioannis' code). Perhaps a more enlightened monk could explain why.

    Update: This works too:

    perl -Mstrict -ne "m/addr/ and eval {print @@; exit}; shift(@@) if pus +h(@@,$_)>5" myfile.txt
    This code works on Win32. Use single-quotes for *nix.

         "For every complex problem, there is a simple answer ... and it is wrong." --H.L. Mencken

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