如何在ruby中将代码注释与正则表达式匹配？

Question

given below sample code

      get => "hello#index" # comments

How to macth '# comments' ?

There is Ruby regular expression editor http://rubular.com/ for test.

Answer 1

Assuming the unrealistic case in which you want to match any text at all after the last hash you can use

/#[^#]*$/

But there is no guarantee the last hash actually begins a comment. If a line had a hash inside a string literal or was itself used as a delimiter in a %w , for example

%w# abc def #

or was used in something like this

dog = "spike"
%w{#dog rat}

then you will have a difficult time trying to come up with a regex. I would go with a ruby parser.

Answer 2

/# comments/可以正常工作