childprocess

https://github.com/enkessler/childprocess

Ruby

Cross-platform Ruby library for managing child processes.

Matrix.build

Creates a matrix of size +row_count+ x +column_count+.
It fills the values by calling the given block,
passing the current row and column.
Returns an enumerator if no block is given.

  m = Matrix.build(2, 4) {|row, col| col - row }
    => Matrix[[0, 1, 2, 3], [-1, 0, 1, 2]]
  m = Matrix.build(3) { rand }
    => a 3x3 matrix with random elements

Source | Google | Stack overflow

Edit

git clone [email protected]:enkessler/childprocess.git
cd childprocess
open

Contribute

# Make a new branch

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

# Commit to git

git add git commit -m "better docs for Matrix.build"

# 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-build-for-pr

hub pull-request

# Celebrate!