That's the case for JavaScript, but most interpreted languages I know will throw a compile-time error (call it parse-time if you want) if they find an unknown variable. Perl 6 does that by default, and Perl does it if you do
use strict;
use warnings;
at the beginning, which you should do anyways.
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That's the case for JavaScript, but most interpreted languages I know will throw a compile-time error (call it parse-time if you want) if they find an unknown variable. Perl 6 does that by default, and Perl does it if you do
at the beginning, which you should do anyways.