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 = {}

  if hash
    hash.each_pair do |key, value|
      @table[new_ostruct_member(key)] = value
    end
  end
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 20

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, '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 77

def table
  @table
end

Instance Method Details

#==(other) ⇒ Object

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# File 'opal/stdlib/ostruct.rb', line 47

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 53

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 12

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

#[]=(name, value) ⇒ Object

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# File 'opal/stdlib/ostruct.rb', line 16

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

#delete_field(name) ⇒ Object

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# File 'opal/stdlib/ostruct.rb', line 79

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 39

def each_pair
  return enum_for :each_pair unless block_given?

  @table.each_pair do |pair|
    yield pair
  end
end

#eql?(other) ⇒ Boolean

Returns:

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# File 'opal/stdlib/ostruct.rb', line 59

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 73

def hash
  @table.hash
end

#inspect ⇒ Object Also known as: to_s

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# File 'opal/stdlib/ostruct.rb', line 99

def inspect
  %x{
    var top = (ostruct_ids === undefined),
        ostruct_id = #{__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 do |name, value|
      "#{name}=#{value.inspect}"
    end.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 88

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

#respond_to_missing?(mid, include_private = false) ⇒ Boolean

:nodoc:

Returns:

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# File 'opal/stdlib/ostruct.rb', line 34

def respond_to_missing?(mid, include_private = false) # :nodoc:
  mname = mid.to_s.chomp('=').to_sym
  @table&.key?(mname) || super
end

#to_h ⇒ Object

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# File 'opal/stdlib/ostruct.rb', line 65

def to_h
  @table.dup
end

#to_n ⇒ Object

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# File 'opal/stdlib/ostruct.rb', line 69

def to_n
  @table.to_n
end