November 2017
Intermediate to advanced
670 pages
17h 35m
English
When we try to reverse the order of operations, this is what we're trying to do:

This does not compute.
We start by passing a Boolean true to Emphasize, but what does that mean? What are we trying to do? We are not changing the direction of the arrows, but we are attempting to change the order in which we call them. Given our context of beginning with a Boolean and trying to get a "yes!!" or a "no!!" out, it only makes sense to apply our Humanize and Emphasize functions in one direction. We are, in effect, trying to compose backwards:
func Compose(f Fss, g Fbs) Fbs { return func(n bool) string { return ...