markhu53 / matching.cr

Enhance the matching and deconstruction capabilities of Crystal

matching

Traversing the fields of a structure, matching and assigning values.

Installation

1. Add the dependency to your shard.yml:

   dependencies:
     matching:
       github: Hentioe/matching.cr

2. Run shards install

Usage

require "matching"

class Person
  property name : String
  property age : Int32
  property hobbies : Array(String)

  def initialize(@name, @age, @hobbies)
  end
end

p1 = Person.new("John", 18, ["Swimming"])
p2 = Person.new("Mary", 21, [] of String)

name : String? = nil

Matching.matching(p1, name: name, age: 18, hobbies: ["Swimming"])
pp name # => "John"

Matching.matching(p1, name: name, age: 21)
pp name # => nil

age : Int32? = nil

Matching.matching(p2, name: "Mary", age: age)
pp age # => 21

Contributing

1. Fork it (https://github.com/Hentioe/matching/fork)
2. Create your feature branch (git checkout -b my-new-feature)
3. Commit your changes (git commit -am 'Add some feature')
4. Push to the branch (git push origin my-new-feature)
5. Create a new Pull Request

Contributors

• Hentioe - creator and maintainer