I think this: 

print "$arg matches\n" if grep $arg, @valid;

[download]

Is equivalent to this: 

print "$arg matches\n" if grep { $arg } @valid;

[download]
So as long as @valid and $arg are not false, then the match will also be true. (If $arg is 0 (zero) then the second example will not always be true.)

jeffa

L-LL-L--L-LL-L--L-LL-L--
-R--R-RR-R--R-RR-R--R-RR
B--B--B--B--B--B--B--B--
H---H---H---H---H---H---
(the triplet paradiddle with high-hat)

In reply to Re^4: Little annoying mistakes ... of others by jeffa
in thread Little annoying mistakes ... of others by szabgab

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