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Re: Iterating through HUGE FILES

by smullis (Pilgrim)
on May 12, 2005 at 10:57 UTC ( #456340=note: print w/ replies, xml ) Need Help??


in reply to Iterating through HUGE FILES

Hello there,


I'm surprised no-one else has mentioned this but you should probably check out Tie::File. (Maybe it has been mentioned and I didn't notice.... But anyway).


...lifted straight from the module docs...

# This file documents Tie::File version 0.96 use Tie::File; tie @array, 'Tie::File', filename or die ...; $array[13] = 'blah'; # line 13 of the file is now 'blah' print $array[42]; # display line 42 of the file $n_recs = @array; # how many records are in the file? $#array -= 2; # chop two records off the end for (@array) { s/PERL/Perl/g; # Replace PERL with Perl everywhere in the + file } # These are just like regular push, pop, unshift, shift, and splice # Except that they modify the file in the way you would expect push @array, new recs...; my $r1 = pop @array; unshift @array, new recs...; my $r2 = shift @array; @old_recs = splice @array, 3, 7, new recs...; untie @array; # all finished

Cheers
SM


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