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Reversed operators

Note! This site is about Perl 6.
If you are looking for a solution for Perl 5, please check out the Perl 5 tutorial.

Reversed operators will swap the position of the two operands. So instead of switching the two arguments as in $b cmp $a one can write $a Rcmp $b.

Frankly I don't yet see any use of it but I am sure others will.

tutorial/arrays/reversed_operators.p6

#!/usr/bin/env perl6
use v6;

say 2 / 4; # 0.5
say 2 R/ 4; # 2

# spaceship operator
say 1 <=> 2; # Less
say 2 <=> 1; # More

say 1 R<=> 2; # More
say 2 R<=> 1; # Less

say "a" gt "b"; # False
say "a" Rgt "b"; # True

Output

tutorial/arrays/reversed_operators.p6.out

0.5
2

Less
More
More
Less

False
True


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Gabor Szabo
Written by Gabor Szabo

Published on 2012-01-01


Prev: Negated Relation Operators

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