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#!/usr/bin/ruby
# -*- mode: ruby -*-
# $Id: lists.ruby,v 1.3 2005-06-10 16:59:56 igouy-guest Exp $
# http://www.bagley.org/~doug/shootout/
NUM = Integer(ARGV.shift || 1)
SIZE = 10000
def test_lists()
# create a list of integers (Li1) from 1 to SIZE
li1 = (1..SIZE).to_a
# copy the list to li2 (not by individual items)
li2 = li1.dup
# remove each individual item from left side of li2 and
# append to right side of li3 (preserving order)
li3 = Array.new
while (not li2.empty?)
li3.push(li2.shift)
end
# li2 must now be empty
# remove each individual item from right side of li3 and
# append to right side of li2 (reversing list)
while (not li3.empty?)
li2.push(li3.pop)
end
# li3 must now be empty
# reverse li1 in place
li1.reverse!
# check that first item is now SIZE
if li1[0] != SIZE then
p "not SIZE"
return(0)
end
# compare li1 and li2 for equality
if li1 != li2 then
return(0)
end
# return the length of the list
return(li1.length)
end
for iter in 1 .. NUM
result = test_lists()
end
print result, "\n"
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