HtDP Videos for CS 3520/6520

• HtDP 0 — intro (1:06)

  Introducing the design recipe.

• HtDP 1 — atomic (3:17)

  Using the design recipe for atomic data.

• HtDP 2 — compound (3:47)

  Using the design recipe for compound data. At this point, the template starts to help a little.

• HtDP 3 — nested (4:00)

  Using the design recipe for nested data. Adds the idea that a reference a type declaration to a type declaration means that the template refers a template (and probably the fully implemented function uses a function).

• HtDP 4 — variants (3:46)

  A data type with multiple variants means that the template has a case dispatch.

• HtDP 5 — lists (6:26)

  A list is a data type with variants that refers back to itself, so the template sets up a recursive function.

• HtDP 6 — variants again (9:05)

  Sets up an extended example, which starts as a data type with variants.

• HtDP 7 — trees (8:34)

  Extends the example so that the data type defines trees — which is just another example of a data type with variants that refers back to itself.

• HtDP 8 — along for the ride (8:47)

  Sometimes, a function takes an extra argument that gets passed around as-is to other functions or recursive calls.

• HtDP 9 — accumulators (9:40)

  Sometimes, a function needs to accumulate information on a recursive call.