This is a property of how javascript and python do closures. In the above code i refers to the same piece of memory in every case. So f and g are closed over i.

This is a property of how javascript and python do closures. In the above code i refers to the same piece of memory in every case. So f and g are closed over i. The reference is preserved but the value is not. This behavior is the motivation behind the do keyword in CoffeeScript. Here's more on this: http://stackoverflow.com/questions/233673/lexical-closures-in-python http://stackoverflow.com/questions/233673/lexical-closures-i...