The special variables $a and $b are also used to specify order. Here's a very simple example: 

$ perl -E '
    my @x = (23, 12, 45);
    say "Unsorted:";
    say for @x;
    say "Ascending:";
    say for sort { $a <=> $b } @x;
    say "Descending:";
    say for sort { $b <=> $a } @x;
'
Unsorted:
23
12
45
Ascending:
12
23
45
Descending:
45
23
12

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How would you implement that in your hypothetical syntax?

— Ken

In reply to Re^4: Notation of sort function by kcott
in thread Notation of sort function by Alphaphi

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