Isochron

A gem to do something exactly once. Inspired by Go's sync.Once.

Add this line to your application's Gemfile:

gem 'isochron'

And then execute:

$ bundle

Or install it yourself as:

$ gem install isochron

mylist = ['a', 'b', 'c']

# returns a capture object holding the passed block
cap = Isochron.capture do
  mylist.pop
end

# the first call executes the block, subsequent calls return the stored value
pp cap.call
pp cap.call
pp mylist

=begin
 [fg-386] isochron > ruby example.rb
"c"
"c"
["a", "b"]
=end

Bug reports and pull requests are welcome on GitHub at https://github.com/packrat386/isochron. This project is intended to be a safe, welcoming space for collaboration, and contributors are expected to adhere to the Contributor Covenant code of conduct.

The gem is available as open source under the terms of the MIT License.

Everyone interacting in the Isochron project’s codebases, issue trackers, chat rooms and mailing lists is expected to follow the code of conduct.