This tutorial is regarding Flay gem helps you to avoid duplications and similarities in code to write a clean code

Flay gem analyzes your code and returns the scope to refactor

installation process :-

gem install flay

or add below line in you Gemfile and bundle

gem ‘flay’

after successfully installing the gem below command will give you output

flay ./app

this command will process all the code and return you the result and score (lower is better) suppose you have to run it for only controllers or models then you can specify it in the path in front of the flay

flay ./app/models

flay ./app/controllers

Output:-

The output will be like

1
2
3
4
5
6
7
8
9
Total score (lower is better) = 277
1) IDENTICAL code found in :defn (mass*2 = 64)
  ./app/something.rb:71
  ./app/somethin2.rb:79

2) Similar code found in:attrasgn (mass = 63)
  ./app/something.rb:71
  ./app/somethin2.rb:79
    ./app/somethin3.rb:89

So, above output tells that files have identical or similar code Then on this finding, you can try to optimize the code of that particular file by using SOLID or DRY principles

Flay also have some extension of JS and ERB

• flay-actionpackUse Rails ERB handler.
• flay-jsProcess JavaScript files.