Class: Module
Overview
Author: Stefano Harding <[email protected]> License: Apache License, Version 2.0 Copyright: © 2014-2015 Stefano Harding
Licensed under the Apache License, Version 2.0 (the “License”); you may not use this file except in compliance with the License. You may obtain a copy of the License at
http://www.apache.org/licenses/LICENSE-2.0
Unless required by applicable law or agreed to in writing, software distributed under the License is distributed on an “AS IS” BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. See the License for the specific language governing permissions and limitations under the License.
Instance Method Summary collapse
-
#set(option, value = self, &block) ⇒ Object
Sets an option to the given value.
-
#to_obj ⇒ Object
Create an instance of Object and extend it with
self
. -
#wrap_method(sym, &blk) ⇒ Object
(also: #wrap)
Creates a new method wrapping the previous of the same name.
Instance Method Details
#set(option, value = self, &block) ⇒ Object
Sets an option to the given value. If the value is a proc, the proc will be called every time the option is accessed.
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# File 'lib/garcon/core_ext/module.rb', line 67 def set(option, value=self, &block) raise ArgumentError if block && value != self value = block if block if value.kind_of?(Proc) if value.arity == 1 yield self else (class << self; self; end).module_eval do define_method(option, &value) define_method("#{option}?"){ !!__send__(option) } define_method("#{option}="){ |val| set(option, Proc.new{val}) } end end elsif value == self option.each{ |k,v| set(k, v) } elsif respond_to?("#{option}=") __send__("#{option}=", value) else set(option, Proc.new{value}) end self end |
#to_obj ⇒ Object
Create an instance of Object and extend it with self
.
mod = Module.new do
def foo; "foo"; end
end
obj = mod.to_obj
obj.foo #=> "foo"
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# File 'lib/garcon/core_ext/module.rb', line 31 def to_obj o = Object.new o.extend self o end |
#wrap_method(sym, &blk) ⇒ Object Also known as: wrap
Creates a new method wrapping the previous of the same name. Reference to the old method is passed into the new definition block as the first parameter.
class WrapExample
def foo
"foo"
end
wrap_method(:foo) do |old_meth, *args|
old_meth.call + '!'
end
end
example = WrapExample.new
example.foo #=> 'foo!'
Keep in mind that this cannot be used to wrap methods that take a block.
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# File 'lib/garcon/core_ext/module.rb', line 57 def wrap_method( sym, &blk ) old = instance_method(sym) define_method(sym) { |*args| blk.call(old.bind(self), *args) } end |