elasticsearch-ruby

https://github.com/elastic/elasticsearch-ruby

Ruby

Ruby integrations for Elasticsearch

Matrix#cofactor

Returns the (row, column) cofactor which is obtained by multiplying
the first minor by (-1)**(row + column).

  Matrix.diagonal(9, 5, -3, 4).cofactor(1, 1)
    => -108

Source | Google | Stack overflow

Edit

git clone [email protected]:elastic/elasticsearch-ruby.git

cd elasticsearch-ruby

open

Contribute

# Make a new branch

git checkout -b -your-name--update-docs-Matrix-cofactor-for-pr

# Commit to git

git add git commit -m "better docs for Matrix#cofactor"

# Open pull request

gem install hub # on a mac you can `brew install hub`

hub fork

git push <your name> -your-name--update-docs-Matrix-cofactor-for-pr

hub pull-request

# Celebrate!