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Re: Dynamic hash keys

by murugu (Curate)
on Aug 17, 2010 at 12:04 UTC ( #855475=note: print w/ replies, xml ) Need Help??


in reply to Dynamic hash keys

I dont know whether i understood the OP question correctly or not. I have written a snippet which will change all the "that" in keys/values to "them". Correct me if i am wrong.

Added some more elements in to that hash for navigational purpose.

#!/usr/bin/perl -w use strict; use Data::Dumper; my $this = {'data'=>{}, 'name'=>'this'}; my $that = {'name'=>"that", 'value'=>"123"}; $this->{data}->{ $that->{'name'} } = $that; $this->{data}->{that}->{abc}->{that}="them"; $this->{data}->{abc}->{that}->{that}->{that}->{abc}->{that} = "them"; $this->{data}->{abc}->{that}->{that}->{that} = "abc"; print Dumper $this; my $struct = &change($this,"that","them"); print Dumper($struct); sub change { my ($struct,$input,$output)=@_; if ((ref $struct)=~/HASH/){ foreach my $t (keys %{$struct}) { if (ref $struct->{$t}) { if ($t eq $input) { my $k = $struct->{$t}; $struct->{$output}=$k; delete $struct->{$t}; &change($struct->{$output},$input,$output); } &change($struct->{$t},$input,$output); } else { $struct->{$t} = $output if ($struct->{$t} eq $input +); if ($t eq $input) { my $k = $struct->{$t}; $struct->{$output}=$k; delete $struct->{$t}; } } } } return $struct; }

Regards,
Murugesan Kandasamy
use perl for(;;);


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