Ruby排列计算
发布时间:2020-12-17 04:11:46 所属栏目:百科 来源:网络整理
导读:今天PHP站长网 52php.cn把收集自互联网的代码分享给大家,仅供参考。 #!/usr/bin/env ruby# PERMUTATIONS COMPUTER# based on Bogomolyn algorithm# http://www.bearcave.com/random_hacks/permute.html# Author: Alessio
以下代码由PHP站长网 52php.cn收集自互联网 现在PHP站长网小编把它分享给大家,仅供参考 #!/usr/bin/env ruby # PERMUTATIONS COMPUTER # based on Bogomolyn algorithm # http://www.bearcave.com/random_hacks/permute.html # Author: Alessio Saltarin http://axsaxs.altervista.org/ class PermutationComputer attr_reader :bigbox # Array of permutations attr_reader :count # Number of elements found def initialize(size) @permutationSize = size @bigbox = Array.new @level = -1 @count = 1 @numbers = Array.new(@permutationSize) (@permutationSize-1).downto(0) { |j| @numbers[j] = 0} end def compute() visit(@numbers,0) @count -= 1 end def visit(numberArray,k) @level += 1 numberArray[k] = @level if (@level == @permutationSize) @bigbox << numberArray.dup # we pass the value,not the reference! @count += 1 else 0.upto(@permutationSize - 1) do |i| if (numberArray[i] == 0) visit(numberArray,i) end end end @level -= 1 numberArray[k] = 0 end end puts "Bogolomyn Permutations Computer v.1.0" # Permutations of numbers between 1 and 4 permutations = PermutationComputer.new(4) puts "== START COMPUTING PERMUTATIONS ==" permutations.compute puts "== #{permutations.count} elements found:" permutations.bigbox.each do |line| puts line.inspect end puts "== END ==" 以上内容由PHP站长网【52php.cn】收集整理供大家参考研究 如果以上内容对您有帮助,欢迎收藏、点赞、推荐、分享。 (编辑:李大同) 【声明】本站内容均来自网络,其相关言论仅代表作者个人观点,不代表本站立场。若无意侵犯到您的权利,请及时与联系站长删除相关内容! |