function composition

Jon Bentley walks through three implementations of Hoare's Quicksort, from a dozen-line C function to a series of systematic code transformations that make the program ever simpler and more powerful. It is a Google Tech Talk on code elegance and program derivation.

Neuroscientist Jill Bolte Taylor describes watching her own brain functions shut down during a massive stroke. She gives a first-person account of losing speech, motion and self-awareness.