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uninitialized $_ sneaks past warnings in grep/map block or expression

by rir (Vicar)
on Sep 01, 2010 at 13:36 UTC ( [id://858335]=perlquestion: print w/replies, xml ) Need Help??

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  1. or download this
    ## perl 5.10.1
use strict;
...
grep $ary[$_ ], @ary;  # no warning

grep $ary[$oo], @ary;  # warns
  2. or download this
    ## perl 5.10.1
use strict;
...
grep {$ary[$_ ]} @ary;  # no warning
grep {$ary[$oo]} @ary;  # warns

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