https://github.com/ruby/mathn
Deprecated library that extends math operations.
https://github.com/ruby/mathn
mathn ruby
Last synced: about 1 year ago
JSON representation
Deprecated library that extends math operations.
- Host: GitHub
- URL: https://github.com/ruby/mathn
- Owner: ruby
- License: other
- Created: 2017-04-07T08:21:45.000Z (about 9 years ago)
- Default Branch: master
- Last Pushed: 2024-10-31T05:59:19.000Z (over 1 year ago)
- Last Synced: 2025-03-30T05:04:38.012Z (about 1 year ago)
- Topics: mathn, ruby
- Language: Ruby
- Homepage:
- Size: 170 KB
- Stars: 12
- Watchers: 29
- Forks: 15
- Open Issues: 1
-
Metadata Files:
- Readme: README.md
- License: COPYING
Awesome Lists containing this project
README
# Mathn
[](https://travis-ci.org/ruby/mathn)
mathn serves to make mathematical operations more precise in Ruby and to integrate other mathematical standard libraries.
Without mathn:
```ruby
3 / 2 => 1 # Integer
```
With mathn:
```ruby
3 / 2 => 3/2 # Rational
```
mathn keeps value in exact terms.
Without mathn:
```ruby
20 / 9 * 3 * 14 / 7 * 3 / 2 # => 18
```
With mathn:
```ruby
20 / 9 * 3 * 14 / 7 * 3 / 2 # => 20
```
## Global Behavioral changes
While older version of 'mathn', just by required, caused changes to
the behavior (and even the types) of operations on classes like
Integer newer `mathn` introduces the refinements `Math::N`, and you
have to enable it.
Before ruby 2.5, `mathn` was part of the ruby standard library. It was
was [deprecated in ruby 2.2.0](https://github.com/ruby/ruby/blob/v2_2_0/NEWS#stdlib-compatibility-issues-excluding-feature-bug-fixes),
and [removed from ruby 2.5.0](https://github.com/ruby/ruby/blob/ruby_2_5/NEWS#stdlib-compatibility-issues-excluding-feature-bug-fixes).
In order to use the library with a current version of ruby,
you must install it as a gem.
## Installation
Add this line to your application's Gemfile:
```ruby
gem 'mathn'
```
And then execute:
$ bundle
Or install it yourself as:
$ gem install mathn
## Usage
```ruby
require 'mathn'
using Math::N
```
## Development
After checking out the repo, run `bin/setup` to install dependencies. Then, run `rake test` to run the tests. You can also 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`, which will create a git tag for the version, push git commits and tags, and push the `.gem` file to [rubygems.org](https://rubygems.org).
## Contributing
Bug reports and pull requests are welcome on GitHub at https://github.com/ruby/mathn.
## License
The gem is available as open source under the terms of the [MIT License](http://opensource.org/licenses/MIT).