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Versions: 28
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Stored size: 1.79 KB
Contents
class Class
# get singleton methods to target class without super class methods
def class_methods
self.methods - Object.methods
end
# bind a singleton method to a class object
def create_class_method(method,&block)
self.class_eval do
define_singleton_method method do |*args|
block.call *args
end
end
end
# create an instance method
def create_instance_method(method,&block)
self.class_eval do
define_method method do |*args|
block.call *args
end
end
end
# Iterates over all subclasses (direct and indirect)
def each_subclass
ObjectSpace.each_object(Class) { | candidate |
begin
yield candidate if candidate < self
rescue ArgumentError
# comparison of Class with Class failed (ArgumentError)
end
}
end
# Returns an Array of subclasses (direct and indirect)
def subclasses_all
ret = []
each_subclass {|c| ret.push c}
ret
end
alias :all_subclasses :subclasses_all
# Returns an Array of direct subclasses
def subclasses
ret = []
each_subclass {|c| ret.push(c) if c.superclass == self }
ret
end
alias :subclass :subclasses
# create singleton attribute
def class_attr_accessor(name)
### GET
begin
define_method name do
class_variable_get "@@#{name}"
end
end
### SET
begin
define_method "#{name}=" do |new_val|
class_variable_set "@@#{name}", new_val
end
end
end
# create class instance attribute
def instance_attr_accessor(name)
### GET
begin
define_method name do
instance_variable_get "@#{name}"
end
end
### SET
begin
define_method "#{name}=" do |new_val|
instance_variable_set "@#{name}", new_val
end
end
end
end
Version data entries
28 entries across 28 versions & 2 rubygems