Class: Any2Tmx::Traversable

Inherits:
Object
  • Object
show all
Defined in:
lib/any2tmx/traversable.rb

Instance Attribute Summary collapse

Instance Method Summary collapse

Constructor Details

#initialize(collection) ⇒ Traversable

Returns a new instance of Traversable.



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# File 'lib/any2tmx/traversable.rb', line 5

def initialize(collection)
  @collection = collection
end

Instance Attribute Details

#collection ⇒ Object (readonly)

Returns the value of attribute collection.



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# File 'lib/any2tmx/traversable.rb', line 3

def collection
  @collection
end

Instance Method Details

#dig(path) ⇒ Object 



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# File 'lib/any2tmx/traversable.rb', line 21

def dig(path)
  path.inject(:start) do |ret, seg|
    if ret == :start
      collection[seg]
    elsif ret
      if seg.is_a?(Numeric) && ret.is_a?(Array)
        ret[seg]  # array index case
      elsif seg.is_a?(String) && ret.is_a?(Hash)
        ret[seg]  # hash key case
      end
    end
  end
end

#each_entry(&block) ⇒ Object 



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# File 'lib/any2tmx/traversable.rb', line 9

def each_entry(&block)
  if block_given?
    each_entry_helper(collection, [], &block)
  else
    to_enum(__method__)
  end
end

#size ⇒ Object 



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# File 'lib/any2tmx/traversable.rb', line 17

def size
  each_entry.inject(0) { |ret, _| ret + 1 }
end

#zip(other_traversable) ⇒ Object 



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# File 'lib/any2tmx/traversable.rb', line 35

def zip(other_traversable)
  each_entry.each_with_object({}) do |(entry, path), ret|
    other_entry = other_traversable.dig(path)
    ret[entry] = other_entry if other_entry
    yield if block_given? && other_entry
  end
end