enumeration.md

Enumeration

People should understand the concept of looping/enumerating through things. They might not know about specific loops (for/while) or about enumerating an array using a higher-order function (like each), but the general concept of stepping through an array should be familiar.

Tracks should teach the normal idiomatic ways to loop/enumerate in their language, but do not need to be exhaustive about all the possibilities (e.g. don't bother teaching for in Ruby).

Exercises

Stack of cards 2

This exercise deals with analysis on a stack of playing cards. The reference implementation (JavaScript) teaches:

• Find the index of an item in an array
• Find the index of an item matching a predicate in an array
• Test a predicate against all items in an array
  • short-circuit on one true (some)
  • short-circuit on one false (every)

Implementations

Track	Exercise	Changes
JavaScript	arrays	None

Bartender

This exercise deals with looping to enumerate data structures or to perform repetitive tasks. The reference implementation (Swift) teaches:

• The existence and use of for-in loops
• The existence and use of while loops
• The existence and use of repeat loops
• The existence and use of control transfer statements
  • skip computation on some conditions(continue)

Implementations

Track	Exercise	Changes
Swift	loops	None