[Solved] How to create hash with duplicate keys

Question

Perl is telling you exactly what is wrong. You have used the strict pragma, so using the %hash variable without declaring it is a syntax error. While the string %hash does not appear in your code, the string $hash{...} does, on each of the problem lines. This is the syntax to access an element of the %hash, which is why strict is complaining.

You have declared the variable $hash, so accessing an element of the contained hash reference is written $$hash{...} or $hash->{...}. Fix the problem lines to access the correct variable and the code will compile.

Accepted Answer

Perl is telling you exactly what is wrong. You have used the strict pragma, so using the %hash variable without declaring it is a syntax error. While the string %hash does not appear in your code, the string $hash{...} does, on each of the problem lines. This is the syntax to access an element of the %hash, which is why strict is complaining.

You have declared the variable $hash, so accessing an element of the contained hash reference is written $$hash{...} or $hash->{...}. Fix the problem lines to access the correct variable and the code will compile.