childprocess

https://github.com/enkessler/childprocess

Ruby

Cross-platform Ruby library for managing child processes.

Observable#changed

Set the changed state of this object.  Notifications will be sent only if
the changed +state+ is +true+.

+state+:: Boolean indicating the changed state of this Observable.

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-Observable-changed-for-pr

# Commit to git

git add git commit -m "better docs for Observable#changed"

# Open pull request

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

hub fork

git push <your name> -your-name--update-docs-Observable-changed-for-pr

hub pull-request

# Celebrate!