"Did you?"

I did.

Syntax error without "+":

$ perl -MO=Deparse -e 'my @b = @{ reduce { push @$a, $b if !@$a || $b 
+ne $a->[-1]; $a } [], @a };'
syntax error at -e line 1, near "$b if"
-e had compilation errors.

[download]

Syntax OK with "+":

$ perl -MO=Deparse -e 'my @b = @{ +reduce { push @$a, $b if !@$a || $b
+ ne $a->[-1]; $a } [], @a };'
my(@b) = @{do {
    push @$a, $b if not @$a or $b ne $a->[-1];
    $a
}->reduce([], @a);};
-e syntax OK

[download]

— Ken

In reply to Re^6: reduce like iterators by kcott
in thread reduce like iterators by LanX

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