> To my mind if I return to a piece of dynamically typed code written any time other than in the same session I have to load a whole mental model of the entire

> To my mind if I return to a piece of dynamically typed code written any time other than in the same session I have to load a whole mental model of the entire code, what types all the variables are This is one reason my favorite model is the "egg model" - hard outer shell (static typed signature) of a function with a soft gooey center - dynamic code internally. It lets you use the convenience of dynamic typing but confines the scope of the mental budget to understanding just a few lines of dynamically typed code. Languages like groovy are pretty good for this type of code.