Use POST() and your typos will be more obvious

Another way to make typos and many other kinds of mistakes more obvious is to use the warnings and strict pragmata (as recommended in many basic debugging checklists):

>perl -le
"use warnings;
 use strict;
 ;;
 print qq{stringized array ref: }; [ a => 1, b => 2, ];
"
Useless use of anonymous list ([]) in void context at -e line 1.
stringized array ref:
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Update: diagnostics can also be helpful for the Perl/programming tyro.