Ruby implementation for tuples known from functional programming.
Tuple combines a fixed number of items together so that they can be passed around as a whole. Unlike an array or list, a tuple can hold objects with different types but they are also immutable.
Add this line to your application's Gemfile:
And then execute:
Or install it yourself as:
$ gem install tuples
You are provided with two classes:
The main difference between two of them are that
Pair always consists of 2 elements - when initialized with less - the missing ones are filled with
nil, when initialized with more - an
ArgumentError is raised.
You can initialize them in different ways:
Tuple.new(1, 2) Tuple.new([1, 2]) Tuple(1, 2) Tuple([1, 2]) Tuple[1, 2]
depending on which syntax you feel more convenient with.
Both of the classes have some auxiliary methods:
arity- which returns number of values inside tuple
second(only pair) - which returns a corresponding elements
that gives you an access to a particular elements
Tuples are also comparable which means you can compare them, match them in
case statement or even sort and find them in an array.
After checking out the repo, run
bin/setup to install dependencies. Then, run
bin/console for an interactive prompt that will allow you to experiment.
To install this gem onto your local machine, run
bundle exec rake install. To release a new version, update the version number in
version.rb, and then run
bundle exec rake release to create a git tag for the version, push git commits and tags, and push the
.gem file to rubygems.org.
To run all tests from
spec directory execute:
bundle exec rspec
- Fork it ( https://github.com/[my-github-username]/tuples/fork )
- Create your feature branch (
git checkout -b my-new-feature)
- Commit your changes (
git commit -am 'Add some feature')
- Push to the branch (
git push origin my-new-feature)
- Create a new Pull Request