Class: OpenStruct

Inherits:
Object show all
Defined in:
opal/stdlib/ostruct.rb

Instance Attribute Summary collapse

Instance Method Summary collapse

Constructor Details

#initialize(hash = nil) ⇒ OpenStruct

Returns a new instance of OpenStruct



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# File 'opal/stdlib/ostruct.rb', line 2

def initialize(hash = nil)
  @table = {}

  hash.each_pair {|key, value|
    @table[new_ostruct_member(key)] = value
  } if hash
end

Dynamic Method Handling

This class handles dynamic methods through the method_missing method

#method_missing(name, *args) ⇒ Object 



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# File 'opal/stdlib/ostruct.rb', line 18

def method_missing(name, *args)
  if args.length > 2
    raise NoMethodError.new("undefined method `#{name}' for #<OpenStruct>", name)
  end
  if name.end_with? '='
    if args.length != 1
      raise ArgumentError.new "wrong number of arguments (0 for 1)"
    end
    @table[new_ostruct_member(name[0 .. -2])] = args[0]
  else
    @table[name.to_sym]
  end
end

Instance Attribute Details

#table ⇒ Object (readonly)

Returns the value of attribute table



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# File 'opal/stdlib/ostruct.rb', line 70

def table
  @table
end

Instance Method Details

#==(other) ⇒ Object 



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# File 'opal/stdlib/ostruct.rb', line 40

def ==(other)
  return false unless other.is_a?(OpenStruct)

  @table == other.instance_variable_get(:@table)
end

#===(other) ⇒ Object 



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# File 'opal/stdlib/ostruct.rb', line 46

def ===(other)
  return false unless other.is_a?(OpenStruct)

  @table === other.instance_variable_get(:@table)
end

#[](name) ⇒ Object 



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# File 'opal/stdlib/ostruct.rb', line 10

def [](name)
  @table[name.to_sym]
end

#[]=(name, value) ⇒ Object 



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# File 'opal/stdlib/ostruct.rb', line 14

def []=(name, value)
  @table[new_ostruct_member(name)] = value
end

#delete_field(name) ⇒ Object 



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# File 'opal/stdlib/ostruct.rb', line 72

def delete_field(name)
  sym = name.to_sym
  begin
    singleton_class.__send__(:remove_method, sym, "#{sym}=")
  rescue NameError
  end
  @table.delete sym
end

#each_pair ⇒ Object 



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# File 'opal/stdlib/ostruct.rb', line 32

def each_pair
  return enum_for :each_pair unless block_given?

  @table.each_pair {|pair|
    yield pair
  }
end

#eql?(other) ⇒ Boolean

Returns:



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# File 'opal/stdlib/ostruct.rb', line 52

def eql?(other)
  return false unless other.is_a?(OpenStruct)

  @table.eql? other.instance_variable_get(:@table)
end

#hash ⇒ Object 



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# File 'opal/stdlib/ostruct.rb', line 66

def hash
  @table.hash
end

#inspect ⇒ Object Also known as: to_s 



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# File 'opal/stdlib/ostruct.rb', line 92

def inspect
  %x{
    var top = (ostruct_ids === undefined),
        ostruct_id = #{self.__id__};
  }
  begin
    result = "#<#{self.class}"
    %x{
      if (top) {
        ostruct_ids = {};
      }
      if (ostruct_ids.hasOwnProperty(ostruct_id)) {
        return result + ' ...>';
      }
      ostruct_ids[ostruct_id] = true;
    }

    result += ' ' if @table.any?

    result += each_pair.map {|name, value|
      "#{name}=#{value.inspect}"
    }.join ", "

    result += ">"

    result    
  ensure
    %x{
      if (top) {
        ostruct_ids = undefined;
      }
    }
  end
end

#new_ostruct_member(name) ⇒ Object 



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# File 'opal/stdlib/ostruct.rb', line 81

def new_ostruct_member(name)
  name = name.to_sym
  unless respond_to?(name)
    define_singleton_method(name) { @table[name] }
    define_singleton_method("#{name}=") { |x| @table[name] = x }
  end
  name
end

#to_h ⇒ Object 



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# File 'opal/stdlib/ostruct.rb', line 58

def to_h
  @table.dup
end

#to_n ⇒ Object 



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# File 'opal/stdlib/ostruct.rb', line 62

def to_n
  @table.to_n
end