mutant

https://github.com/mbj/mutant

Ruby

Automated code reviews via mutation testing - semantic code coverage.

Mutant::Util.one

Return only element in array if it contains exactly one member

Source | Google | Stack overflow

Edit

git clone [email protected]:mbj/mutant.git
cd mutant
open lib/mutant/util.rb

Contribute

# Make a new branch
git checkout -b -your-name--update-docs-Mutant--Util-one-for-pr

# Commit to git
git add lib/mutant/util.rbgit commit -m "better docs for Mutant::Util.one"

# Open pull request
gem install hub # on a mac you can `brew install hub`
hub fork
git push <your name> -your-name--update-docs-Mutant--Util-one-for-pr
hub pull-request

# Celebrate!