You don't have to make sure of having an array ref. for a particular key, your code $route{$key} ||= [];, as doing the push @{$route{$key}}, $line; will push onto an auto-vivified array ref. if one doesn't exist or push onto the existing ref. otherwise.

Cheers,

JohnGG

In reply to Re^2: Searching for two lines that begin with the same string by johngg
in thread Searching for two lines that begin with the same string by tgrossner

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