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Re: How to 'peek' at next line while parsing with <>

by japhy (Canon)
on Jul 11, 2002 at 16:57 UTC ( #181072=note: print w/replies, xml ) Need Help??

in reply to How to 'peek' at next line while parsing with <>

Well, you can always use redo()...
while ($line = <>) { # redo comes HERE # do something my $next = <>; if ($next !~ /^#/) { # if the next line DOES NOT start with a "#" # reuse it and restart this iteration of the loop $line = $next; redo; } }
Or you can use seek() and tell() to make Perl think nothing ever happened:
while ($line = <>) { # ... my $pos = tell ARGV; my $next = <>; seek ARGV, $pos, 0; # ... }

Jeff[japhy]Pinyan: Perl, regex, and perl hacker, who'd like a job (NYC-area)
s++=END;++y(;-P)}y js++=;shajsj<++y(p-q)}?print:??;

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