Re: a little problem with sorting my data

From the prompt,

sort data > sorted_data
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Alternatively, the following would be an efficient Perl solution:

my %grouped;
while (...) {
    my @fields = ...;
    push @{ $grouped{$fields[0]} }, \@fields;
}

for my $group (values %grouped) {
    ...
}
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Comment on Re: a little problem with sorting my data Select or Download Code

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Re^2: a little problem with sorting my data by DStaal (Chaplain) on Jul 27, 2009 at 17:53 UTC
On your second one: That will group by ID, but I don't believe it will sort by ID. That is to say: You will get all the records with a certain ID together, but you won't get the ID's themselves in any particular order. (Unless `values` does some subtle sorting I'm not aware of.)	[reply] [d/l]
Re^3: a little problem with sorting my data by ikegami (Patriarch) on Jul 27, 2009 at 18:25 UTC
I had written a line about that, but I must have deleted it by accident. Indeed, it groups but it doesn't sort. I had already provided a solution for sorting. If the OP also wants to sort the ids and then do something with them, he can do: `for ( sort <$fh> ) { my @fields = ...; ... }` [download]	[reply] [d/l]