Re^2: Update XML Values using two primary keys

Thank you for the Information. Since I am new to Perl so I don't know whether the tuple datatype can be used but anyways thank you.

Comment on Re^2: Update XML Values using two primary keys

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Re^3: Update XML Values using two primary keys by jcb (Parson) on Jan 06, 2021 at 23:22 UTC
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.	[reply] [d/l] [select]

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Re^3: Update XML Values using two primary keys
by jcb (Parson) on Jan 06, 2021 at 23:22 UTC

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.

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