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https://github.com/baweaver/any
An Any type, modeled after Scala's Any
https://github.com/baweaver/any
Last synced: about 1 month ago
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An Any type, modeled after Scala's Any
- Host: GitHub
- URL: https://github.com/baweaver/any
- Owner: baweaver
- License: mit
- Created: 2018-08-05T05:23:26.000Z (over 6 years ago)
- Default Branch: master
- Last Pushed: 2021-01-01T20:07:23.000Z (almost 4 years ago)
- Last Synced: 2024-08-07T08:12:56.699Z (5 months ago)
- Language: Ruby
- Size: 9.77 KB
- Stars: 12
- Watchers: 1
- Forks: 1
- Open Issues: 1
-
Metadata Files:
- Readme: README.md
- License: LICENSE.txt
- Code of conduct: CODE_OF_CONDUCT.md
Awesome Lists containing this project
README
# Any
Any is a simple gem. When you compare it against anything, it's always true.
This is a play at Scala's Any type, mostly used for pattern matching type
techniques.
* https://docs.scala-lang.org/tour/unified-types.html
* https://www.scala-lang.org/api/2.12.3/scala/Any.html
## Credits
Thanks to [@soffes](https://github.com/soffes) for allowing me to repurpose the gem `Any`!
The original will be maintained at versions 0.0.1 and 0.0.2 from [this repo](https://github.com/soffes/any)
## Usage
Note that I'm using Qo here. If these two issues are
added in Ruby 2.6+ it'll enable us to do this without
the need for Qo:
* Hash#=== - https://bugs.ruby-lang.org/issues/14869
* Array#=== - https://bugs.ruby-lang.org/issues/14916
I've commented on each to note this.
For now, I will leave Qo in the specs so that we don't
have a hard dependency on 2.6+, especially considering
that at the time of writing this it's still in development.
```ruby
require 'qo' # gem install qo @ v0.3.0
case ['Foo', 25]
when Qo[/^F/, Any] then true
else false
end
# => true
case {id: 1, name: 'foo', age: 42}
when Qo[id: Any, name: /^f/, age: Any] then true
else false
end
# => true
case {id: 1, name: 'foo'}
when Qo[id: Any, name: /^f/, age: Any] then true
else false
end
# => false
```
Qo behaves much like the proposals, except in that it's permissive
for Arrays of mismatched lengths and works with Objects.
In 2.6+, assuming the two above are accepted, you could do this:
```ruby
case ['Foo', 25]
when [/^F/, Any] then true
else false
end
# => true
case {id: 1, name: 'foo', age: 42}
when {id: Any, name: /^f/, age: Any} then true
else false
end
# => true
case {id: 1, name: 'foo'}
when {id: Any, name: /^f/, age: Any} then true
else false
end
# => false
```
## Installation
Add this line to your application's Gemfile:
```ruby
gem 'any'
```
And then execute:
$ bundle
Or install it yourself as:
$ gem install any
## Contributing
Bug reports and pull requests are welcome on GitHub at https://github.com/baweaver/any. This project is intended to be a safe, welcoming space for collaboration, and contributors are expected to adhere to the [Contributor Covenant](http://contributor-covenant.org) code of conduct.
## License
The gem is available as open source under the terms of the [MIT License](https://opensource.org/licenses/MIT).
## Code of Conduct
Everyone interacting in the Any project’s codebases, issue trackers, chat rooms and mailing lists is expected to follow the [code of conduct](https://github.com/baweaver/any/blob/master/CODE_OF_CONDUCT.md).