Challenge 1 of 5
Create a map
Instructions
Create `ages` as a Map with `"Ada"` → 36.
Editor
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Module 2 of 2
maps
Store keyed data with Map — get, set, has, and iterate.
Sets & Maps · 0/5 completed · scroll down for every challenge
Challenge 2 of 5 · Set and get
Challenge 2 of 5
Set and get
Instructions
Write `setAge(map, name, age)` that sets the key and returns the map.
Editor
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Challenge 3 of 5 · Has key
Challenge 3 of 5
Has key
Instructions
Write `hasKey(map, key)` that returns whether the map has the key.
Editor
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Challenge 4 of 5 · Map size
Challenge 4 of 5
Map size
Instructions
Write `countEntries(map)` that returns `map.size`.
Editor
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Challenge 5 of 5 · Keys array
Challenge 5 of 5
Keys array
Instructions
Write `mapKeys(map)` returning an array of keys.
Editor
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