If $_ is a string that that does not look_like_number(), then don't be fooled into thinking that $_ + 0 will inevitably evaluate to zero: 
$_ = '12*&&#$%';
$_ += 0;
print $_, "\n";
# prints 12

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Cheers,
Rob

In reply to Re^3: Warning-free numerification of a string by syphilis
in thread Warning-free numerification of a string by oxone

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