While I agree that hashes wouldn't be too useful here (being unordered), I think of hashes as having three basic uses (not one):
-
- Unordered set of associations (Notice the plural var name)
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my %user_passwds = (
joe => ...,
jeff => ...,
john => ...,
);
-
- Unordered set of properties (Notice the singular var name)
-
my %user = (
id => 'joe',
name => 'Joe',
passwd => ...,
home_dir => ...,
);
-
- Uniqueness constraint
-
my %unique;
++$unique{$_} foreach @list;
@list = keys %unique;
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