Hi,

I think isNumber() is doing the same as Scalar::Util::looks_like_number(), except that the former is returning '0' for FALSE, whereas the latter returns '' (the empty string) for FALSE.
One slight advantage I can see in using looks_like_number() is that it doesn't require the warnings pragma.
And, I think, isNumber() is rather convoluted in that int($N) is going to perform essentially the same check as looks_like_number() and then catch the warning if that check fails, before assigning 0 to $R and returning. So it's also a little less efficient.

But that just makes isNumber() the more interesting solution !

Cheers,
Rob

In reply to Re^3: How to capture the "isn't numeric" warning? by syphilis
in thread How to capture the "isn't numeric" warning? by harangzsolt33

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