There is no explicit tuple data type in Perl; you will need to either track both pieces in separate variables or use an array, but note that there are no builtin operators for comparing arrays elementwise: == on arrays compares their lengths (because it imposes scalar context on its operands) and == on array references checks for object identity (true if both references refer to the same object).

However, while the 2-tuple nature of your primary key will not be directly reflected in your program, properly understanding it will help you to maintain clear thinking and accurate reasoning about your code.

In reply to Re^3: Update XML Values using two primary keys by jcb
in thread Update XML Values using two primary keys by pratikpooja

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