On Thu, 18 Jan 2001 20:33:03 -0500, Ronald J Kimball wrote:
>I make no guarantee of the correctness of this regex:
>
>/^\s*[+-]?(?:\d+\.?\d*|\.?\d+)(?:[eE][+-]?\d+)?(?!\n)$/;
It looks almost right, apart from a few details.
First: you don't need the question mark after the decimal point in the
second alternative for the first group. Digits only is covered in the
first alternative.
But: why don't you like your numbers ending in a newline? Perl doesn't
complain if you do:
$_ = "1\n";
print 2+$_;
even with warnings enabled.
And trailing whitspace doesn't hurt, either.
/^\s*[+-]?(?:\d+\.?\d*|\.\d+)(?:[eE][+-]?\d+)?\s*/
--
Bart.
