module Chione::MethodUtilities
A collection of methods for declaring other methods.
class MyClass extend Chione::MethodUtilities singleton_attr_accessor :types singleton_method_alias :kinds, :types end MyClass.types = [ :pheno, :proto, :stereo ] MyClass.kinds # => [:pheno, :proto, :stereo]
Public Instance Methods
Create a reader in the form of a predicate for the given attrname
.
# File lib/chione/mixins.rb, line 73 def attr_predicate( attrname ) attrname = attrname.to_s.chomp( '?' ) define_method( "#{attrname}?" ) do instance_variable_get( "@#{attrname}" ) ? true : false end end
Create a reader in the form of a predicate for the given attrname
as well as a regular writer method.
# File lib/chione/mixins.rb, line 83 def attr_predicate_accessor( attrname ) attrname = attrname.to_s.chomp( '?' ) attr_writer( attrname ) attr_predicate( attrname ) end
Creates readers and writers that allow assignment to the attributes of the singleton of the declaring object that correspond to the specified symbols
.
# File lib/chione/mixins.rb, line 52 def singleton_attr_accessor( *symbols ) symbols.each do |sym| singleton_class.__send__( :attr_accessor, sym ) end end
Creates instance variables and corresponding methods that return their values for each of the specified symbols
in the singleton of the declaring object (e.g., class instance variables and methods if declared in a Class).
# File lib/chione/mixins.rb, line 27 def singleton_attr_reader( *symbols ) singleton_class.instance_exec( symbols ) do |attrs| attr_reader( *attrs ) end end
Creates methods that allow assignment to the attributes of the singleton of the declaring object that correspond to the specified symbols
.
# File lib/chione/mixins.rb, line 43 def singleton_attr_writer( *symbols ) singleton_class.instance_exec( symbols ) do |attrs| attr_writer( *attrs ) end end
Creates an alias for the original
method named newname
.
# File lib/chione/mixins.rb, line 67 def singleton_method_alias( newname, original ) singleton_class.__send__( :alias_method, newname, original ) end
Create predicate methods and writers that allow assignment to the attributes of the singleton of the declaring object that correspond to the specified symbols
.
# File lib/chione/mixins.rb, line 61 def singleton_predicate_accessor( *symbols ) singleton_class.extend( Chione::MethodUtilities ) singleton_class.attr_predicate_accessor( *symbols ) end
Create instance variables and corresponding methods that return true or false values for each of the specified symbols
in the singleton of the declaring object.
# File lib/chione/mixins.rb, line 36 def singleton_predicate_reader( *symbols ) singleton_class.extend( Chione::MethodUtilities ) singleton_class.attr_predicate( *symbols ) end