如何在ruby中分隔括号？

Question

我一直在使用以下代码来解决这个问题。我正在制作一个将 IUPAC 名称更改为结构的程序，所以我想分析用户输入的字符串。在 IUPAC 名称中也有括号。我想根据括号提取复合名称。我最后展示的方式。

我想修改方式，使输出变成这样并存储在数组中：

As ["(4'-氰基联苯-4-基)","5-[(4'-氰基联苯-4-基)氧基]", "({5-[(4'-氰基联苯-4-基)氧基]戊基}" ....等]

我写的分割代码是：

    Reg_bracket=/([^(){}\[\]]*)([(){}\[\]])/

    attr_reader :obrk, :cbrk     
    def count_level_br
        @xbrk=0
        @cbrk=0
        if  @temp1 
          @obrk+=1 if @temp1[1]=="(" || @temp1[1]=="[" ||@temp1[1]=="{"  
          @obrk-=1 if @temp1[1]==")" || @temp1[1]=="]" ||@temp1[1]=="}"
       end
       puts @obrk.to_s
    end

    def split_at_bracket(str=nil) #to split the brackets according to Regex
        if str a=str
        else a=self
        end
        a=~Reg_bracket
        if $& @temp1=[$1,$2,$']
        end
        @temp1||=[a,"",""]
      end


      def find_block
       @obrk=0 , r=""
       @temp1||=["",""]
        split_at_bracket
        r<<@temp1[0]<<@temp1[1]              
             count_level_br
       while @obrk!=0                  
          split_at_bracket(@temp1[2])
         r<<@temp1[0]<<@temp1[1]
         count_level_br
        puts r.to_s
         if @obrk==0
          puts "Level 0 has reached"
          #puts "Close brackets are #{@cbrk}"
           return r 
         end
       end #end

      end
    end #class end'

我使用了正则表达式来匹配括号。然后当它找到任何括号时，它会给出匹配前、匹配后和匹配后第二个的结果，然后继续执行直到结束。

我现在得到的输出是这样的。

1
2
1-[(
3
1-[({
4
1-[({5-[
5
1-[({5-[(
4
1-[({5-[(4'-cyanobiphenyl-4-yl)
3
1-[({5-[(4'-cyanobiphenyl-4-yl)oxy]
2
1-[({5-[(4'-cyanobiphenyl-4-yl)oxy]pentyl}
1
1-[({5-[(4'-cyanobiphenyl-4-yl)oxy]pentyl}oxy)
0
1-[({5-[(4'-cyanobiphenyl-4-yl)oxy]pentyl}oxy)carbonyl]
Level 0 has reached
testing ends'

Answer 1

我编写了一个简单的程序来使用三个不同的正则表达式匹配字符串。第一个将帮助分离括号，第二个将分离方括号，第三个将给出花括号。这是以下代码。我希望你能在你的程序中有效地使用它。

reg1 = /(\([a-z0-9\'\-\[\]\{\}]+.+\))/ # for parenthesis
reg2 = /(\[[a-z0-9\'\-\(\)\{\}]+.+\])/ # for square brackets
reg3 = /(\{[a-z0-9\'\-\(\)\[\]]+.+\})/ # for curly braces  

a = Array.new 
s = gets.chomp

x = reg1.match(s)
a << x.to_s
str = x.to_s.chop.reverse.chop.reverse
while x != nil do
    x = reg1.match(str)
    a << x.to_s
    str = x.to_s.chop
end

x = reg2.match(s)
a << x.to_s
str = x.to_s.chop.reverse.chop.reverse
while x != nil do
        x = reg2.match(str)
        a << x.to_s
        str = x.to_s.chop
end

x = reg3.match(s)
a << x.to_s
str = x.to_s.chop.reverse.chop.reverse
while x != nil do
        x = reg3.match(str)
        a << x.to_s
        str = x.to_s.chop
end

puts a

输出如下：

ruby reg_yo.rb 
4,4'{-1-[({5-[(4'-cyanobiphenyl-4-yl)oxy]pentyl}oxy)carbonyl]-2-[(4'-cyanobiphe‌​nyl-4-yl)oxy]ethylene}dihexanoic acid # input string

({5-[(4'-cyanobiphenyl-4-yl)oxy]pentyl}oxy)carbonyl]-2-[(4'-cyanobiphe‌​nyl-4-yl)
(4'-cyanobiphenyl-4-yl)oxy]pentyl}oxy)
(4'-cyanobiphenyl-4-yl)

[({5-[(4'-cyanobiphenyl-4-yl)oxy]pentyl}oxy)carbonyl]-2-[(4'-cyanobiphe‌​nyl-4-yl)oxy]
[(4'-cyanobiphenyl-4-yl)oxy]pentyl}oxy)carbonyl]
[(4'-cyanobiphenyl-4-yl)oxy]

{-1-[({5-[(4'-cyanobiphenyl-4-yl)oxy]pentyl}oxy)carbonyl]-2-[(4'-cyanobiphe‌​nyl-4-yl)oxy]ethylene}
{5-[(4'-cyanobiphenyl-4-yl)oxy]pentyl}

更新：我已经修改了代码以便搜索递归模式。