SONY Go For It: 1) の解答
解答
life_clock.rb
#!/usr/bin/env ruby # -*- coding: utf-8 -*- # FILE: life_clock.rb # AUTHOR: rhysd (http://d.hatena.ne.jp/rhysd/) # License: MIT license {{{ # Permission is hereby granted, free of charge, to any person obtaining # a copy of this software and associated documentation files (the # "Software"), to deal in the Software without restriction, including # without limitation the rights to use, copy, modify, merge, publish, # distribute, sublicense, and/or sell copies of the Software, and to # permit persons to whom the Software is furnished to do so, subject to # the following conditions: # # The above copyright notice and this permission notice shall be included # in all copies or substantial portions of the Software. # # THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS # OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF # MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. # IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY # CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, # TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION WITH THE # SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE. # }}} require 'bigdecimal' SECONDS_OF_DAY = 86400 def life_in_24hours year,month,day,lifetime from = Time.gm year,month,day to = Time.gm(year+lifetime,month,day) - 1 now = Time.now raise "lifetime is invalid!!" if from > to raise "Time over!!" if now > to life_seconds = BigDecimal.new((to - from).to_s) now_seconds = BigDecimal.new((now - from).to_s) now_of_the_day = now_seconds / life_seconds * SECONDS_OF_DAY result_time = Time.gm(0) + now_of_the_day result_time.strftime "%Hh %Mm %Ss" end # # main # if __FILE__ == $0 then print "i) a b c n=" a,b,c,n = STDIN.gets.split(" ").map{|i| i.to_i} puts life_in_24hours a,b,c,n puts print "ii) a b c n=" a,b,c,n = STDIN.gets.split(" ").map{|i| i.to_i} puts life_in_24hours a,b,c,n end
test_life_clock.rb
#!/usr/bin/env ruby # -*- coding: utf-8 -*- # FILE: test_life_clock.rb # AUTHOR: rhysd (http://d.hatena.ne.jp/rhysd/) # License: MIT license {{{ # Permission is hereby granted, free of charge, to any person obtaining # a copy of this software and associated documentation files (the # "Software"), to deal in the Software without restriction, including # without limitation the rights to use, copy, modify, merge, publish, # distribute, sublicense, and/or sell copies of the Software, and to # permit persons to whom the Software is furnished to do so, subject to # the following conditions: # # The above copyright notice and this permission notice shall be included # in all copies or substantial portions of the Software. # # THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS # OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF # MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. # IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY # CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, # TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION WITH THE # SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE. # }}} require './life_clock.rb' require 'minitest/unit' class TestLifeClock < MiniTest::Unit::TestCase def test_method_respond assert_respond_to(main, :life_in_24hours, "doesn't have life_in_24hours method") end def test_invalid_value [1, 10, 21].each do |life| assert_raise(RuntimeError){ life_in_24hours 1990,9,29,life } end assert_raise(RuntimeError){ life_in_24hours 1990,9,29,-30 } end def test_value_pattern [[1900,200], [1950,200], [2000,200], [1990,40], [1990,80], [2000,40], [2000,80]].each do |y,l| assert_match(/^[0-2][0-9]h [0-6][0-9]m [0-6][0-9]s$/, result = life_in_24hours(y,9,29,l), "invalid return value: #{result}") end end end
コードの中にもある通り,ライセンスはMIT Licenseです.
今回は簡単な単体テストも書いてみました.
Fixnumでは値が溢れてしまうので,BigDecimalを使っています.