It's not entirely clear what format your initial data structure is taking. Are the values a single string? Are an array of values?

Assuming that they are array refs, and that your ranges are ordered from lesser value to greater value, this should work just fine: 

my %hash = (
    a => ['15-19',30,35,120],
    b => ['15-17','30-35',40],
    c => ['15-18',30,35,120],
);

for (values %hash) {
    @$_ = map {/^(\d+)-(\d+)$/ ? ($1..$2) : $_} @$_;
}

use Data::Dumper;
print Dumper(\%hash);

[download]
If your ranges could be reversed, then the following adaptation would work: 
for (values %hash) {
    @$_ = map {!/^(\d+)-(\d+)$/ ? $_ : ($1 < $2) ? ($1..$2) : reverse 
+($2..$1)} @$_;
}

[download]
- Miller

In reply to Re: hash with multiple values per key by wind
in thread hash with multiple values per key by nidhi

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