mifflin,
looks_like_number was introduced in version 1.10 of Scalar::Util. The sub looks like this:
sub looks_like_number {
local $_ = shift;
# checks from perlfaq4
return 1 unless defined;
return 1 if (/^[+-]?\d+$/); # is a +/- integer
return 1 if (/^([+-]?)(?=\d|\.\d)\d*(\.\d*)?([Ee]([+-]?\d+))?$/); #
+a C float
return 1 if ($] >= 5.008 and /^(Inf(inity)?|NaN)$/i) or ($] >= 5.006
+001 and /^Inf$/i);
0;
}
As I stated in my reply - I do not think this meets your requirements because it also handles decimals, scientific notation, NaN, and Inf.
Cheers - L~R
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