Re: string comparison

You could just rejoin your strings after spliting and sorting and then compare them:

#! perl -slw
use strict;

sub reorder {
    my $string = shift;
    return join ',', sort{ $a cmp $b } split ',', $string;
};;

my $string1 = '~cake,pastry';
my $string2 = 'pastry,~cake';
my $string3 = 'cake,pastry';

print "$_->[ 0 ] eq $_->[ 1 ]",
    reorder( $_->[ 0 ] ) eq reorder( $_->[ 1 ] )
        ? ' match '
        : ' dont match'
    for [ $string1, $string2 ],
        [ $string1, $string3 ],
        [ $string2, $string3 ];
__END__

[ 8:16:14.39] P:\test>junk2
~cake,pastry eq pastry,~cake match
~cake,pastry eq cake,pastry dont match
pastry,~cake eq cake,pastry dont match
[download]

Not hugely efficient, but probably not too bad if there are only a few elements in your strings.

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Comment on Re: string comparison Download Code

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Re^2: string comparison by reasonablekeith (Deacon) on May 27, 2005 at 08:51 UTC
Seems like an overly complicated example. Isn't it just as simple as... ? `my $string1 = '~cake,pastry'; my $string2 = 'pastry,~caske'; if (sort_text($string1) eq sort_text($string2)) { print "match\n"; } sub sort_text { join(',', sort split(/,/, $_[0]) ) }` [download] --- my name's not Keith, and I'm not reasonable.	[reply] [d/l]
Re^3: string comparison by tphyahoo (Vicar) on May 27, 2005 at 10:02 UTC
Extending this logic a bit, and using <DATA> to read in the test data: `use strict; use warnings; my ($first_line, $current_line); while (<DATA>) { chomp; # get rid of newline # get the first line sorted if ($. == 1) { $first_line = join ",", sort( split /,/,); } else { #die if doesn't match the first line sorted. $current_line = join ",", sort( split /,/,); die "$_ didn't match first line" unless $current_line eq $firs +t_line; } } __DATA__ ~cake,pastry,donuts,meringue pastry,~cake,meringue,donuts meringue, donuts,pastry,~cake,meringue` [download] This dies on the third line, as it should.	[reply] [d/l]