FullJoin

provides full join for Array

It looks like Array#zip, but detect same value and gather them like a Full Join.

Installation

Add this line to your application's Gemfile:

gem 'full_join'

And then execute:

$ bundle

Or install it yourself as:

$ gem install full_join

Usage

Hoge = Struct.new(:id, keyword_init: true)

array1 = [Hoge.new(id: 1), Hoge.new(id: 2), Hoge.new(id: 3)]
array2 = [Hoge.new(id: 2), Hoge.new(id: 3), Hoge.new(id: 4)]

array1.full_join(array2)
#=> [
#  [#<struct Hoge id=1>, nil]
#  [#<struct Hoge id=2>, #<struct Hoge id=2>]
#  [#<struct Hoge id=3>, #<struct Hoge id=3>]
#  [nil, #<struct Hoge id=4>]
#]

also, like this

Hoge = Struct.new(:id, :name, keyword_init: true)
Fuga = Struct.new(:id, :name, keyword_init: true)

array1 = [
  Hoge.new(id: 1, name: "AAA"),
  Hoge.new(id: 2, name: "BBB"),
  Hoge.new(id: 3, name: "CCC")
]
array2 = [
  Fuga.new(id: 101, name: "BBB"),
  Fuga.new(id: 102, name: "CCC"),
  Fuga.new(id: 103, name: "DDD")
]

array1.full_join(array2, &:name)
#=> [
#  [#<struct Hoge id=1, name="AAA">, nil],
#  [#<struct Hoge id=2, name="BBB">, #<struct Fuga id=101, name="BBB">],
#  [#<struct Hoge id=3, name="CCC">, #<struct Fuga id=102, name="CCC">],
#  [nil, #<struct Fuga id=103, name="DDD">]
#]

Development

After checking out the repo, run bin/setup to install dependencies. Then, run rake spec 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.

Contributing

Bug reports and pull requests are welcome on GitHub at https://github.com/naari3/full_join.