Daniel Rychlik <> wrote:
> Hello,
>
> How does one update a hash element in PERL?
See 'perldoc -q "Perl.*and.*perl"'
>
> I am using anonymous hashes to process a file, and each element in
> the anonymous has its own value...
>
> If the file has success on process, I delete the hash element from
> the anonymous hash...
>
> If it the file fails to process, I need to increment the attempts to
> the next higher number...
>
> I tried this,
>
> If ($HASH{KEY}->{attempts} != '5') {
>
> $attempted = $HASH{KEY}->{attempts} + '1';
Loose the quotes in the above 2 lines. They are numbers, not strings.
>
> $HASH{KEY}->{attempts} => $attempted; #Update the hash key
That should be assignment (i.e. '='), not the special comma operator
(i.e. '=>').
However, it is a lot simpler to use the pre- or post-increment
operators. For example:
++$HASH{KEY}->{attempts};
See 'perldoc perlop'.
>
> } else {
>
> Move the file to the error folder...
>
> }
>
> When I run it, I get "Useless use of hash element in void context.
> Useless use of private variable in void context...
>
> How could this better be written?
HTH
--
Brian Raven
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