Is the order of the lines meaningfull?
If not you could use a hash which holds an array with all the values:
my %people;
while( my $line = <IN> ) {
my ($name, $value) = split /\s+/, $line;
if (!exists $people{$name}) {
$people{$name} = [ $value ]; # store array with one value
}
else {
push @{$people{$name}}, $value; # push 2nd,3rd,.. value on arr
+ay
}
}
The
%people hash would then look like:
%people = (
'Andreas' => [
'27'
],
'John' => [
'15'
],
'Andrew' => [
'34'
],
'Jim' => [
'12',
'57'
],
'Peter' => [
'08'
]
);
This preserves the order of the values but not the order of the names.
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