Re: Test for numeric

You might want to check out merlyn's is_numeric function

sub is_numeric {
  ($_[0] & ~ $_[0]) eq "0";
}
[download]

Which tests whether a scalar is a numeric value or a string value e.g 42 vs "42".
HTH

_________ broquaint

Comment on Re: Test for numeric Download Code

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Re: Re: Test for numeric by John M. Dlugosz (Monsignor) on Jun 21, 2003 at 20:26 UTC
More like "this is not a digit at all" vs 42. It evaluates to 0 with a warning, which is the intention--to make sure you check for the zeros before doing arithmetic. But what's an elegant way to see if it's one of the strings without generating the warning? I was thinking of `no warning whatever-it-is;`, but thought that something direct was available with 5.8.	[reply]