CODEWITHSUNDEEP
ruby
Fermuch
Fermuch

Reputation: 487

Pass data from function to another inside the same class

I have the following class:

class Foo
  def [](*files)
  end

  def read(file)
  end
end

And I want to call the function read like this:

bar = Foo.new
bar['todo.txt'].read

Is there a way to make this syntax possible?

Upvotes: 2

Views: 76

Answers (2)

Arie Xiao
Arie Xiao

Reputation: 14082

Use instance variable to share context among instance methods.

class Foo
  def [](*files)
    @files = files
    self
  end
  def read(file = nil)
    if file
      File.read(file)
    else
      @files.map{|file| File.read(file)}.join
    end
  end
end

Upvotes: 2

Andbdrew
Andbdrew

Reputation: 11895

If you want to be able to chain those methods, I believe you will have to return self from [].

class Foo
  attr_accessor :files
  def [](*files)
    @files = files
    self
  end

  def read
    p @files
  end
end

Upvotes: 2

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