From: "Peña, Botp" <botp@...>
Date: 2008-03-04T12:06:18+09:00
Subject: Re: Split the string

From: Christopher Swasey [mailto:christopher.swasey@gmail.com] 
# On 3/3/08, Michael Fellinger <m.fellinger@gmail.com> wrote:
# > require 'scanf'
# >  "3:43;SD,2:65;SD,3:50;Inc".split(',').map do |e|
# >   e.scanf('%d:%d;%s')
# >  end
# >  # [[3, 43, "SD"], [2, 65, "SD"], [3, 50, "Inc"]]
# >
# >  ^ manveru
# 
# We have a winner!
#

careful, you might want to benchmark that, too.

a sample run on a windows machine,

C:\Documents and Settings\botp>cat test.rb

require 'benchmark'
require 'enumerator'
require 'scanf'

n=1_000
s="3:43;SD,2:65;SD,3:50;Inc"

puts RUBY_VERSION,RUBY_PLATFORM

Benchmark.bmbm do |x|
  x.report("scan") do
    n.times do
      s.scan(/(\d+):(\d+);(\w+)/).map do |x| [x[0].to_i,x[1].to_i,x[2]] e
    end
  end
  x.report("slice") do
    n.times do
      a=[]
      s.split(/,|:|;/).each_slice(3){|x| a << [x[0].to_i,x[1].to_i,x[2]]}
    end
  end
  x.report("split2") do
    n.times do
      s.split(/,/).map do |i|
        t = i.split(/:|;/)
        t[0..1].map { |j| j.to_i } << t[2]
      end
    end
  end
  x.report("scanf") do
    n.times do
      s.split(',').map do |e| e.scanf('%d:%d;%s') end
    end
  end

end


C:\Documents and Settings\peñaijm>ruby test.rb
1.8.6
i386-mswin32
Rehearsal ------------------------------------------
scan     0.063000   0.000000   0.063000 (  0.063000)
slice    0.078000   0.000000   0.078000 (  0.079000)
split2   0.109000   0.000000   0.109000 (  0.110000)
scanf    2.938000   0.015000   2.953000 (  3.188000)
--------------------------------- total: 3.203000sec

             user     system      total        real
scan     0.063000   0.000000   0.063000 (  0.063000)
slice    0.093000   0.000000   0.093000 (  0.094000)
split2   0.125000   0.000000   0.125000 (  0.125000)
scanf    2.984000   0.032000   3.016000 (  3.031000)

kind regards -botp