Re^3: Parse a file into a hash

You should probably show us some sample data, so we can tell what "can't detect a key" means. But in general, you're talking about creating a hash of arrays. So for every key/value pair, you'll want to do something like this:

push @{$stack{$key}}, $value;
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That pushes the value onto the array referenced by the key within the hash. Later, you'll be able to go through them with:

for my $key (keys %stack){
  for my $value (@{$stack{$key}}){
    # do stuff with $key and $value
  }
}
[download]

Aaron B.
My Woefully Neglected Blog, where I occasionally mention Perl.

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Re^4: Parse a file into a hash by kazak (Beadle) on Apr 06, 2012 at 14:50 UTC
Thanks for your reply. I don't know how to preserve initial format of the file here, so I'll replace empty cells of.csv with null. Username; Asset Name Corinna Mayer;JKDef4574 Janek Huska;NAdf8f48g5 Eric Shtits;JSd5345kPFl null;A878rfgP56 null;KDLefrtgt Erik Fisher;UiO8trve As you can see Eric Shtits owns 3 asset names in according to this .csv file, so two fields that supposed to be keys are empty.And I need to implement a solution that will be able to detect that all three asset names belong to one person. Regards, Kazak	[reply]
Re^5: Parse a file into a hash by mendeepak (Scribe) on Apr 07, 2012 at 05:55 UTC
hi check if this code works or not its not tested. `my ($key,$val,$keyprev); open(fh,'< file.txt'); while (<fh>){ $keyprev=$key; ($key,$val)=split /\;/, $_; $key=$keyprev if($key eq""); print "$key :: $val\n"; } close fh;` [download]	[reply] [d/l]
Re^6: Parse a file into a hash by kazak (Beadle) on Apr 09, 2012 at 14:43 UTC
Yes it helped. Thanks to everyone.	[reply]