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Re^4: question about: my $a AND sort {$a <=> $b} keys %hash

by AnomalousMonk (Bishop)
on Aug 06, 2015 at 16:50 UTC ( #1137725=note: print w/replies, xml ) Need Help??


in reply to Re^3: question about: my $a AND sort {$a <=> $b} keys %hash
in thread question about: my $a AND sort {$a <=> $b} keys %hash

Ah, that's interesting, because when I tried something similar, I had  $a within the lexical scope of the comparison function definition, which of course did not work:

c:\@Work\Perl\monks>perl -wMstrict -lE "use warnings; use strict; ;; my $a = 1; ;; sub numerically { $a <=> $b } ;; my @arr = sort qw( 1 2 10 21 11 12 ); say qq{@arr}; ;; @arr = sort numerically @arr; say qq{@arr}; " 1 10 11 12 2 21 1 2 11 21 10 12
I guess the take-away advice is that there should be a heavy application of Don't Do That™ whenever one contemplates creating lexical versions of special, non-punctuation variables.


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