Flipping The Bozo Bit

Can’t change your variables once you assign a value? WTF? Surely, this is something up with which we cannot put! Or: a round-about introduction to some of the concerns addressed by the functional programming paradigm. In This Episode: “I’ve been thinking about Object Oriented Programming.” “And you survived.” Concurrency and shared state Changing the value of 2 What if we can’t change a variable’s value? Side effects: minus the sides. And the effects. A functional primer and the unit test No side effects? No dependency injection! Does dependency injection break the “encapsulation” contract? Lock the doors so we can invent windows. Mock object makes a mockery of … well …. Separating values from behavior The inversion of the inversion Apparently, we’re really interested in address books. What about side-effects, though? I mean, right? Separating side-effects from calculations A walled-off garden of perfection Do