Iteration Patterns
Map, filter, reduce as common loop shapes.
Do this: Read the concept below, then try the quiz or activity.
Lesson 7 of 20
30%
Concept
Many tasks fit patterns: map transforms each item; filter keeps some items; reduce folds many values into one. Prefer built-ins where idiomatic.
Order the steps to filter even numbers
These steps are out of order — can you fix them?
1.Check if divisible by 2
2.Keep passing items
3.Iterate items
4.Return result list