RubyMotion！

http://confreaks.com/events/rubyconf2012

我在学习《R 和 RUBY 数据分析之旅第 3 章》，代码如下： class Restroom attr_reader :queue attr_reader :facilities

def initialize(facilities_per_restroom=3) @queue=[] @facilities=[] @facilities_per_restroom.times{@facilities<<Facility.new} end

def enter(person) unoccupied_facility=@facilities.find{|facility| not facility.occupied?} if unoccupied_facility unoccupied_facility.occupy person else @queue<<person end end

def tick @facilities.each{|f| f.tick} end end

class Restroom

class Facility def initialize @occupier = nil @duration = 0 end def occupy(person) unless occupied? @occupier = person @duration =1 Person.population.delete person true else false end end

def occupied? not @occupier.nil? end

def vacate Person.population<<@occupier @occupier = nil
end

def tick if occupied? and @duration > @occupier.use_duration vacate @duration = 0 elseif occupied? @duration +=1 end end end

class Facility

class Person @@population = [] attr_reader :use_duration attr_accessor :frequency

def initialize(frequency=4,use_duration=1) @frequency= frequency @use_duration=use_duration end

def self.population @@population end

def need_to_go? rand(DURATION)+1<=@frequenty end end

class Person

require 'csv' frequency=3 facilities_per_restroom=3 use_duration=1 population_range=10..600

data={} population_range.step(10).each do |population_size| Person.population.clear population_size.times{Person.population<<Person.new(frequency,use_duration)} data[population_size]=[] restroom=Restroom.new facilities_per_restroom DURATION.times do |t| data[population_size]<<restroom.queue.size queue=restroom.queue.clone restroom.queue.clear unless queue.empty restroom.enter queue.shift end Person.population.each do |person| if person.need_to_do restroom.enter person end end restroom.tick end end

CSV.open('simulation1.csv','w') do |csv| lbl=[] population_range.step(10).each{|population_size|lbl<<population_size} csv<<lbl DURATION.time do |t| row =[] population_range.step(10).each do |population_size| row <<data[population_size][t] end csv <<row end

end

运行结果如下： restroom.rb:90:in `step': no block given (LocalJumpError) from restroom.rb:90

第 90 行：population_range.step(10).each do |population_size|

哪里错了，请指点！

#3 楼 @oicuicu 我觉得这个格式可能不太方便阅读。

#3 楼 @oicuicu 不要歪楼来提问。

#3 楼 @oicuicu 需要提问题的话单独发个帖吧。顺便最好看一下发帖界面右侧的帮助提示，看应该能怎样更好地贴代码。实际上一般在论坛贴代码都很难读，最好发到 http://gist.github.com/

@chunlea 原来这个东西论坛讨论过，感觉好玩。我对编译原理不熟悉，一直很好奇像这种不同语言的代码转编译技术难度怎样，印象中原来 flash 不也做过转成 ios 本地代码的东西，但被封杀了

@Rei 要翻墙吗？视频都打不了，不知道视频有什么特别的。“Expert recording services for conferences, seminars, and workshops.”，应该不止是视频分享吧？

@oicuicu R 不了解，科学计算这方面应该是 python 更强悍一些吧，ruby 有哪一些库比较好的？有 python 那么强大吗？

@drift_ic 可以看看这篇文章http://writings.chunlea.org/articles/7-rubymotion-runtime-guide。反正感觉跟传统的代码转编译还是有些不同的。

#3 楼 @oicuicu 要看看，谢推荐