use feature qw/say/;
my @bb = 1..10; 
while(my ($ind, $val) = each @bb){
    say "ind is $ind";
           if($ind >5){
                while(my ($inner_ind, $inner_val) = each @bb){
                   say "inner ind is $inner_ind, inner val is $inner_v
+al"
        }
    }
}

# will endless loop since while share one iterator

while(my ($ind, $val) = each @bb){
    say "ind is $ind";
}
# this will quit loop successfully.

[download]
I don't understand why every array has to have only one iterator, please enlighten me. and guess each/keys doesn't work on slice would be relative to this reason?

In reply to Re^4: why each/keys/values can't work on slice? (updated) by Anonymous Monk
in thread why each/keys/values can't work on slice? by Anonymous Monk

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