rubocop

https://github.com/bbatsov/rubocop

Ruby

A Ruby static code analyzer, based on the community Ruby style guide.

RuboCop::AST::Node#sibling_index

Returns the index of the receiver node in its siblings. (Sibling index
uses zero based numbering.)

Source | Google | Stack overflow

Edit

git clone [email protected]:bbatsov/rubocop.git
cd rubocop
open lib/rubocop/ast/node.rb

Contribute

# Make a new branch
git checkout -b -your-name--update-docs-RuboCop--AST--Node-sibling_index-for-pr

# Commit to git
git add lib/rubocop/ast/node.rbgit commit -m "better docs for RuboCop::AST::Node#sibling_index"

# Open pull request
gem install hub # on a mac you can `brew install hub`
hub fork
git push <your name> -your-name--update-docs-RuboCop--AST--Node-sibling_index-for-pr
hub pull-request

# Celebrate!