# MultiRange

[![Gem Version](https://img.shields.io/gem/v/multi_range.svg?style=flat)](http://rubygems.org/gems/multi_range)
[![Build Status](https://travis-ci.com/khiav223577/multi_range.svg?branch=master)](https://travis-ci.org/khiav223577/multi_range)
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[![Test Coverage](https://codeclimate.com/github/khiav223577/multi_range/badges/coverage.svg)](https://codeclimate.com/github/khiav223577/multi_range/coverage)

## Supports
- Ruby 1.8 ~ 2.7

## Installation

```ruby
gem 'multi_range'
```

And then execute:

    $ bundle

Or install it yourself as:

    $ gem install multi_range

## Usage

Allow you to manipulate a group of ranges.

### Sample a number
```rb
multi_range = MultiRange.new([1..5, 10..12])
multi_range.sample
# => equals to [1, 2, 3, 4, 5, 10, 11, 12].sample
```

### Range difference
```rb
multi_range = MultiRange.new([1..10])
multi_range -= 5..7
multi_range.ranges
# => [1...5, 8..10]
```

```rb
multi_range = MultiRange.new([1..10, 50..70, 80..100])
multi_range -= 5..85
multi_range.ranges
# => [1...5, 86..100]
```

### Flatten
```rb
multi_range = MultiRange.new([1, 2, 4..6, 7, 8..12])
multi_range.flatten.ranges
# => [1..2, 4..12]
```

### Range-like interface

#### each
```rb
MultiRange.new([1..3, 6, 8..9]).each{|s| print s }
# => 123689
```

#### map
```rb
MultiRange.new([1..3, 6, 8..9]).map{|s| s * 2 }
# => [2, 4, 6, 12, 16, 18]
```

#### index_with
```rb
MultiRange.new([1..3, 6, 8..9]).index_with(true)
# => { 1 => true, 2 => true, 3 => true, 6 => true, 8 => true, 9 => true }
```

#### min
```rb
MultiRange.new([1..3, 6, 8..9]).min
# => 1
```

#### max
```rb
MultiRange.new([1..3, 6, 8..9]).max
# => 9
```

#### to_a
```rb
MultiRange.new([1..3, 6, 8..9]).to_a
# => [1, 2, 3, 6, 8, 9]
```

## 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/khiav223577/multi_range. 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](http://opensource.org/licenses/MIT).