push ( @soln, $val ) if ( $soln[-1] ne $val );

The brackets around the arguments to push are unnecessary, even in the full-blown if-block you used. With postfix-if you can lose the other brackets too:

push @soln, $val if $soln[-1] ne $val;

[download]

I know some folks like the extra brackets but I find removing them aids clarity.

🦛

In reply to Re^2: reduce like iterators by hippo
in thread reduce like iterators by LanX

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