Class: Object

Inherits:
BasicObject
Includes:
InstanceExecMethods
Defined in:
lib/ruco/core_ext/object.rb,
lib/ruco/core_ext/object.rb,
lib/ruco/core_ext/object.rb,
lib/ruco/core_ext/object.rb,
lib/ruco/core_ext/object.rb

Defined Under Namespace

Modules: InstanceExecMethods

Instance Method Summary collapse

Instance Method Details

#cmemoize(*method_names) ⇒ Object

Memoize class methods



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# File 'lib/ruco/core_ext/object.rb', line 100

def cmemoize(*method_names)
  (class << self; self; end).class_eval do
    memoize(*method_names)
  end
end

#deep_copyObject



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# File 'lib/ruco/core_ext/object.rb', line 49

def deep_copy
  Marshal.load(Marshal.dump(self))
end

#delegate(*methods) ⇒ Object

copy from active_support



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# File 'lib/ruco/core_ext/object.rb', line 3

def delegate(*methods)
  options = methods.pop
  unless options.is_a?(Hash) && to = options[:to]
    raise ArgumentError, "Delegation needs a target. Supply an options hash with a :to key as the last argument (e.g. delegate :hello, :to => :greeter)."
  end

  methods.each do |method|
    module_eval(<<-EOS, "(__DELEGATION__)", 1)
def #{method}(*args, &block)
#{to}.__send__(#{method.inspect}, *args, &block)
end
EOS
  end
end

#instance_exec(*args, &block) ⇒ Object

Evaluate the block with the given arguments within the context of this object, so self is set to the method receiver.

From Mauricio’s eigenclass.org/hiki/bounded+space+instance_exec



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# File 'lib/ruco/core_ext/object.rb', line 29

def instance_exec(*args, &block)
  begin
    old_critical, Thread.critical = Thread.critical, true
    n = 0
    n += 1 while respond_to?(method_name = "__instance_exec#{n}")
    InstanceExecMethods.module_eval { define_method(method_name, &block) }
  ensure
    Thread.critical = old_critical
  end

  begin
    send(method_name, *args)
  ensure
    InstanceExecMethods.module_eval { remove_method(method_name) } rescue nil
  end
end

#memoize(*names) ⇒ Object



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# File 'lib/ruco/core_ext/object.rb', line 81

def memoize(*names)
  names.each do |name|
    unmemoized = "__unmemoized_#{name}"
    class_eval %{
      alias   :#{unmemoized} :#{name}
      private :#{unmemoized}
      def #{name}(*args)
        cache = (@#{unmemoized} ||= {})
        if cache.has_key?(args)
          cache[args]
        else
          cache[args] = send(:#{unmemoized}, *args).freeze
        end
      end
    }
  end
end

#silence_warningsObject

copy from active_support



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# File 'lib/ruco/core_ext/object.rb', line 56

def silence_warnings
  with_warnings(nil) { yield }
end

#with_warnings(flag) ⇒ Object

copy from active_support



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# File 'lib/ruco/core_ext/object.rb', line 61

def with_warnings(flag)
  old_verbose, $VERBOSE = $VERBOSE, flag
  yield
ensure
  $VERBOSE = old_verbose
end