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•Re: Re: Re: Is it a number?

by merlyn (Sage)
on Oct 23, 2003 at 14:50 UTC ( [id://301599]=note: print w/replies, xml ) Need Help??


in reply to Re: Re: Is it a number?
in thread Does it look like a number?

Yeah, the difference is the difference between "could this string be converted into a number without getting the warnings if -w is on?" vs "is this value always and only a number?". Everything in the latter case is also true for the former, but the inverse is not true. For example, all external data read from filehandles is always a string initially, so it could never pass this "is_numeric" test.

-- Randal L. Schwartz, Perl hacker
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