: At 12:16 PM 6/30/05 -0500, Joe Discenza wrote:
: >I bet
you're right that "eval($var) eq $var + 0" works; have you
: >benchmarked
it against all the other (regex, e.g.) methods presented?
:
: I haven't
benchmarked it but I can garuntee that it's faster than a regex.
: Anything's
faster than that. ;) This should cover everything:
Thanks for playing. I compared your function with a regex I whipped up (/^[-+]?(\d+(\.\d*)?|\.\d+)([eE][-+]?\d+)?$/, which gave the same results, except for distinguishing "pure" numbers, on your dataset):
Benchmark: timing 100000 iterations of chris,
regex...
chris: 12 wallclock secs (11.86 usr +
0.00 sys = 11.86 CPU) @ 8432.41/s (n=100000)
regex: 2 wallclock secs ( 1.56 usr + 0.00 sys = 1.56 CPU) @
63979.53/s (n=100000)
Regex is pretty fast. Eval is usually pretty slow.
Joe
==============================================================
Joseph P. Discenza, Sr. Programmer/Analyst
mailto:[EMAIL PROTECTED]
Carleton Inc. http://www.carletoninc.com
574.243.6040 ext. 300 fax: 574.243.6060
Providing Financial Solutions and Compliance for over 30 Years
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