The 'Swiss Army Knife' of data structures, Professor Brian Kernighan talks about the associative array with beer & pizza. EXTRA BITS: "Code" Books: Many thanks to Microsoft Research UK for their support with the 'Essentials' mini-series. This video was filmed and edited by Sean Riley. Computer Science at the University of Nottingham: Computerphile is a sister project to Brady Haran's Numberphile. More at