在ruby中将骆驼大小写转换为下划线大小写 [英] Converting camel case to underscore case in ruby

问题描述

有没有现成的函数可以将驼峰字符串转换为下划线分隔的字符串?

Is there any ready function which converts camel case Strings into underscore separated string?

我想要这样的东西:

"CamelCaseString".to_underscore      

返回camel_case_string".

to return "camel_case_string".

...

推荐答案

Rails 的 ActiveSupport使用以下命令为字符串添加下划线:

Rails' ActiveSupport adds underscore to the String using the following:

class String
  def underscore
    self.gsub(/::/, '/').
    gsub(/([A-Z]+)([A-Z][a-z])/,'1_2').
    gsub(/([a-zd])([A-Z])/,'1_2').
    tr("-", "_").
    downcase
  end
end

然后你可以做一些有趣的事情:

Then you can do fun stuff:

"CamelCase".underscore
=> "camel_case"

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