Ruby Monkey Patch Class Method

Patches go into lib core.

Ruby monkey patch class method. So you have to have a way to quickly learn those changes when you jump into a new codebase. 2 monkey patched java methods are only available in ruby code. In the above class you are changing the behavior of the class method defined in the same program file. So the behavior of the class monkey is changed dynamically.

Unfortunately the scope of such changes is global. With that in mind let s look at a completely contrived example. I mostly follow rails monkey patching convention. The above statement asserts that the ruby usage is incorrect but terms evolve and that s not always a bad thing.

Pass dummy class x foo foo bar lambda self. Motivated by the intent to patch existing third party code as a workaround to a bug or feature. For example you often see monkey patches that simply add a convenience method that has no side effect. We are assigning a new method name patchfunc to the existing class method name monkeyfunc.

You have to know where your monkey patches live. All users of the monkey patched class see the same changes. Or perhaps you need to monkey patch a class you own. Ruby has a very beautiful syntax and so it can be tempting to monkey patch a class to turn some ugly method call into something that is more readable.

In ruby the term monkey patch was misunderstood to mean any dynamic modification to a class and is often used as a synonym for dynamically modifying any class at runtime. Due to ruby s open classes you can redefine or add functionality to existing classes. The linking of a new method to the existing class method name happens at runtime. This is called a monkey patch.

Intro to monkey patching in ruby. 3 aspects of this code are likely to change in the next release. This can cause unintended side effects or breakage of programs. These classes methods are implemented in c and there are certain abstractions sacrificed in order to make the implementation easier and more efficient.

42 print x bar but you can t do this for certain built in classes like int or float. Monkey patching changes the behavior of class methods. When you monkey patch core classes you add to the core ruby apis.