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Apprentice

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Map

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Exercises (55)

○Map Constructor — empty Map
Beginner
○Map Constructor — from entries
Beginner
○Map Constructor — get after construct
Beginner
○Map Constructor — typeof
Beginner
○Map Constructor — insertion order
Beginner
○Map size — empty Map
Beginner
○Map size — after set
Beginner
○Map size — two entries
Beginner
○Map size — after delete
Beginner
○Map size — is a number
Beginner
○Map set() — returns same Map
Beginner
○Map set() — get after set
Beginner
○Map set() — overwrite value
Beginner
○Map set() — object key
Intermediate
○Map set() — size after set
Beginner
○Map get() — existing key
Beginner
○Map get() — missing key
Beginner
○Map get() — after overwrite
Beginner
○Map get() — object key reference equality
Intermediate
○Map get() — from multi-entry Map
Beginner
○Map has() — existing key
Beginner
○Map has() — missing key
Beginner
○Map has() — after delete
Beginner
○Map has() — object key
Intermediate
○Map has() — after set
Beginner
○Map delete() — returns true for existing
Beginner
○Map delete() — returns false for missing
Beginner
○Map delete() — size decreases
Beginner
○Map delete() — get after delete
Beginner
○Map delete() — delete twice
Beginner
○Map clear() — size is 0 after clear
Beginner
○Map clear() — returns undefined
Beginner
○Map clear() — has() false after clear
Beginner
○Map clear() — clear empty Map is fine
Beginner
○Map clear() — size before vs after
Beginner
○Map keys() — spread to array
Beginner
○Map keys() — insertion order
Beginner
○Map keys() — type of iterator
Beginner
○Map keys() — empty Map
Beginner
○Map keys() — mixed key types
Intermediate
○Map values() — spread to array
Beginner
○Map values() — insertion order
Beginner
○Map values() — type of iterator
Beginner
○Map values() — empty Map
Beginner
○Map values() — mixed value types
Intermediate
○Map entries() — spread to array
Beginner
○Map entries() — each entry is [k,v]
Beginner
○Map entries() — insertion order
Beginner
○Map entries() — empty Map
Beginner
○Map entries() — destructuring
Intermediate
○Map forEach() — collect values
Beginner
○Map forEach() — collect keys
Beginner
○Map forEach() — third arg is Map
Intermediate
○Map forEach() — empty Map is fine
Beginner
○Map forEach() — insertion order
Beginner