[RUBY] Remove nil and blank string array in rails Array and display them concatenated

I wanted to output the results of various methods as a single string, but there were two types of method return values: the case of nil and the case of"". Only nil can be omitted from # compact of Rails Array. Omitted using reject.

pry(main)> ["Method A", nil, "", "Method B", "Method C"].reject { |e| e.to_s.empty? }.join('、')
=> "Method A, Method B, Method C"