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Re: How to determine if something is numeric?

by stefp (Vicar)
on Jan 31, 2004 at 18:49 UTC ( #325568=note: print w/ replies, xml ) Need Help??

in reply to How to determine if something is numeric?

If by numeric, you means a string that represents a natural integer in the decimal numeration system which first digit is not a zero, it happens to be a string $s that is left unchanged by the operation: $s+0

print +($_+0 eq $_ ? ' ' : 'not '). "numeric: $_\n" for qw( 1 01 + a01 -3 -01 .1 ) numeric: 1 not numeric: 01 not numeric: a01 numeric: -3 not numeric: -01 not numeric: .1
oops, I read you specif without reading the code. I came with the same solution as you.

-- stefp

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