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Re^2: One liner to subtract by 2

by derby (Abbot)
on Jul 24, 2013 at 14:08 UTC ( #1046123=note: print w/replies, xml ) Need Help??

in reply to Re: One liner to subtract by 2
in thread One liner to subtract by 2

You'll lose leading zeros with that.


update: so perl -pe 's/([0-9]{10})$/sprintf("%010d", $1-2)/e'

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Re^3: One liner to subtract by 2
by choroba (Chancellor) on Jul 24, 2013 at 14:10 UTC
    Thanks, fixed.
    لսႽ ᥲᥒ⚪⟊Ⴙᘓᖇ Ꮅᘓᖇ⎱ Ⴙᥲ𝇋ƙᘓᖇ

      Thanks Guys

      the header is on the first line of my file so I'm doing the following

      perl -pe 's/(0-9{10})$/sprintf("%010d", $1-2)/e if $. ==1' TONYFILE.DAT

      for some reason it's not changing the's still 496

      any idea what i'm missing here?

        This outputs the new contents to the standard output. If you want to change the file, you have to add the -i flag:
        perl -i~ -pe ...
        لսႽ ᥲᥒ⚪⟊Ⴙᘓᖇ Ꮅᘓᖇ⎱ Ⴙᥲ𝇋ƙᘓᖇ

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