From: Simon Strandgaard <0bz63fz3m1qt3001@...>
Date: 2003-05-29T19:40:14+09:00
Subject: Re: Array.extend versus instance.extend

Here is my code so far.. you welcome to rip it.
Comments would be nice :-)


> ruby test_misc.rb

TestMisc#test_pop_until .
TestMisc#test_pop_until_non_existing_class .
TestMisc#test_pop_until_regex .
TestMisc#test_shift_until .
TestMisc#test_shift_until_non_existing_class .
TestMisc#test_shift_until_regex .
Time: 0.009481
OK (6/6 tests  12 asserts)
>

> expand -t4 test_misc.rb
require 'misc'
require 'runit/testcase'
require 'runit/assert'
require 'runit/cui/testrunner'

#Array.extend ArrayMisc    # BOOM, why does this not work ?
class Array; include ArrayMisc; end

class TestMisc < RUNIT::TestCase
    def test_shift_until
        ary = [1, 2, "a", 3, 4, "b", 5, 6]
        res = ary.shift_until(String)
        assert_equal([1, 2], res)
        assert_equal(["a", 3, 4, "b", 5, 6], ary)
    end
    def test_shift_until_non_existing_class
        ary = [1, 2, "a", 3, 4, "b", 5, 6]
        res = ary.shift_until(IO)
        assert_equal([], ary)
        assert_equal([1, 2, "a", 3, 4, "b", 5, 6], res)
    end
    def test_shift_until_regex
        ary = [1, 2, "a", 3, 4, "b", 5, 6]
        res = ary.shift_until(/^b/)
        assert_equal(["b", 5, 6], ary)
        assert_equal([1, 2, "a", 3, 4], res)
    end
    def test_pop_until
        ary = [1, 2, "a", 3, 4, "b", 5, 6]
        res = ary.pop_until(String)
        assert_equal([5, 6], res)
        assert_equal([1, 2, "a", 3, 4, "b"], ary)
    end
    def test_pop_until_non_existing_class
        ary = [1, 2, "a", 3, 4, "b", 5, 6]
        res = ary.pop_until(IO)
        assert_equal([], ary)
        assert_equal([1, 2, "a", 3, 4, "b", 5, 6], res)
    end
    def test_pop_until_regex
        ary = [1, 2, "a", 3, 4, "b", 5, 6]
        res = ary.pop_until(/^a/)
        assert_equal([1, 2, "a"], ary)
        assert_equal([3, 4, "b", 5, 6], res)
    end
end

if $0 == __FILE__
    RUNIT::CUI::TestRunner.run(TestMisc.suite)
end
>


> expand -t4 misc.rb
module ArrayMisc
    def shift_until(klass)
        res = []
        while length != 0 and not klass === first
            res << self.shift
        end
        res
    end
    def pop_until(klass)
        res = []
        while length != 0 and not klass === last
            res.unshift(self.pop)
        end
        res
    end
end
>


--
Simon Strandgaard