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Ex 101: Magic bags better than buckets for metaphors

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Dave Gauer 2023-05-05 18:34:36 -04:00
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exercises/101_for5.zig
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@ -79,19 +79,19 @@ pub fn main() void {
// all about:
//
// Let's say you've been tasked with grabbing three glass
// marbles, three spoons, and three feathers from a bucket. But
// you can't use your hands to grab them. Instead, you have a
// special marble scoop, spoon magnet, and feather tongs to grab
// marbles, three spoons, and three feathers from a magic bag.
// But you can't use your hands to grab them. Instead, you must
// use a marble scoop, spoon magnet, and feather tongs to grab
// each type of object.
//
// Now, would you rather have:
// Now, would you rather the magic bag:
//
// A. The items layered so you have to pick up one marble, then
// one spoon, then one feather?
// A. Grouped the items in clusters so you have to pick up one
// marble, then one spoon, then one feather?
//
// OR
//
// B. The items separated by type so you can pick up all of the
// B. Grouped the items by type so you can pick up all of the
// marbles at once, then all the spoons, then all of the
// feathers?
//
@ -103,14 +103,16 @@ pub fn main() void {
// efficient for modern CPUs.
//
// Decades of OOP practices have steered people towards grouping
// different data types together into "objects" with the hope
// that it would be friendlier to the human mind. But
// data-oriented design groups data in a way that is more
// efficient for the computer.
// different data types together into mixed-type "objects" with
// the intent that these are easier on the human mind.
// Data-oriented design groups data by type in a way that is
// easier on the computer.
//
// In Zig terminology, the difference in groupings is sometimes
// known as "Array of Structs" (AoS) versus "Struct of Arrays"
// (SoA).
// With clever language design, maybe we can have both.
//
// In the Zig community, you may see the difference in groupings
// presented with the terms "Array of Structs" (AoS) versus
// "Struct of Arrays" (SoA).
//
// To envision these two designs in action, imagine an array of
// RPG character structs, each containing three different data