I have a file which contains data in the format

2010-02-12_aaa,654
2010-02-12_aaa,248
2010-02-12_bbb,374
2010-02-12_ccc,158
2010-02-13_aaa,745
2010-02-13_bbb,786
2010-02-13_bbb,354
2010-02-13_ddd,852
2010-02-14_bbb,754
2010-02-14_aaa,169
2010-02-14_ccc,965
2010-02-14_ccc,756

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I need to create unique key the value before comma ','. Thus my output shud be

2010-02-12_aaa,902
2010-02-12_bbb,374
2010-02-12_ccc,158
2010-02-13_aaa,745
2010-02-13_bbb,1140
2010-02-13_ddd,852
2010-02-14_bbb,754
2010-02-14_aaa,169
2010-02-14_ccc,1721

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i.e. the portion "2010-02-14_aaa" is key and the value is added up if found repeating key. I thought to try the "unique" module but it will remove the duplicate entries but here i want the aggregated data.

 use List::MoreUtils qw(uniq);

 my @unique = uniq( 1, 2, 3, 4, 4, 5, 6, 5, 7 ); # 1,2,3,4,5,6,7
 my $unique = uniq( 1, 2, 3, 4, 4, 5, 6, 5, 7 ); # 7

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any suggetion wat i should use.

Thanks
AvantA

In reply to create unique key in the entries in a file by avanta

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