... it works with multiple arrays:
...
my @newb =  grep {$_>850}(@b&&@c&&@d);

I'm not sure what you mean by "works" in this context. Is the following output what you expect? 

c:\@Work\Perl\monks>perl -wMstrict -MData::Dump -le
"my @b = (1, 2, 3, 11, 12, 13);
 my @c = (4, 5, 6, 14, 15, 16);
 my @d = (7, 8, 9, 17, 18, 19);
 my @newb = grep { $_ > 10 } (@b && @c && @d);
 dd \@newb;
"
[17, 18, 19]

[download]
Something seems to have happened to the contents of the  @b and  @c arrays. Again, did you intend this? This result comes from the short-circuiting behavior of the  && || and or logical operators; see perlop. (Please see the non-core module Data::Dump for the dd() function. The core Data::Dumper module has dumper functions that you will not need to install a module to access.)

Update: Changed the array initializations in the example code above to make the point more clearly.

Give a man a fish:  <%-{-{-{-<

In reply to Re^2: iterating through array and saving matches to new array (updated) by AnomalousMonk
in thread iterating through array and saving matches to new array by jazzfan

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