From: Robert Dober <robert.dober@...>
Date: 2007-06-22T01:57:35+09:00
Subject: Re: Code Critique: check if int or float

On 6/21/07, ole __ <oliver.saunders@gmail.com> wrote:
> Yes but /^\d+/ isn't the same as /^-?\d+$/.
>
> --
> Posted via http://www.ruby-forum.com/.
>
>
oops, well spotted, but that will not change a lot...

640/140 > cat conversions.rb && ruby conversions.rb
# vim: sts=2 sw=2 tw=0 expandtab nu:

require 'benchmark'

class String
  def int?
    /^-?\d+$/ === self
  end

  def int1?
    Integer(self) rescue false
  end
end
N=10_000
Benchmark.bmbm do
  |bench|
  bench.report( "reg" ) { N.times{ |n| n.to_s.int?; "#{n}x".int? } }
  bench.report( "Int" ) { N.times{ |n| n.to_s.int1?; "#{n}x".int1? } }
end

Rehearsal ---------------------------------------
reg   0.160000   0.000000   0.160000 (  0.188396)
Int   0.440000   0.000000   0.440000 (  0.467686)
------------------------------ total: 0.600000sec

          user     system      total        real
reg   0.160000   0.000000   0.160000 (  0.193306)
Int   0.430000   0.010000   0.440000 (  0.465137)


-- 
You see things; and you say Why?
But I dream things that never were; and I say Why not?
-- George Bernard Shaw