JS Built-ins
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Exercises (85)
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Set Constructor — empty Set
Beginner
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Set Constructor — from array
Beginner
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Set Constructor — deduplication
Beginner
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Set Constructor — typeof
Beginner
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Set Constructor — from string
Beginner
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Set size — empty Set
Beginner
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Set size — after add
Beginner
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Set size — deduplication
Beginner
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Set size — after delete
Beginner
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Set size — is a number
Beginner
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Set add() — returns same Set
Beginner
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Set add() — size increases
Beginner
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Set add() — duplicate no size increase
Beginner
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Set add() — chaining
Beginner
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Set add() — add object
Intermediate
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Set has() — existing value
Beginner
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Set has() — missing value
Beginner
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Set has() — after add
Beginner
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Set has() — after delete
Beginner
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Set has() — object reference
Intermediate
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Set delete() — returns true for existing
Beginner
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Set delete() — returns false for missing
Beginner
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Set delete() — size decreases
Beginner
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Set delete() — has() false after delete
Beginner
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Set delete() — delete twice
Beginner
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Set clear() — size is 0 after clear
Beginner
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Set clear() — returns undefined
Beginner
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Set clear() — has() false after clear
Beginner
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Set clear() — size before vs after
Beginner
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Set clear() — clear empty Set
Beginner
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Set values() — spread to array
Beginner
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Set values() — insertion order
Beginner
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Set values() — dedup visible
Beginner
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Set values() — empty Set
Beginner
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Set values() — type of iterator
Beginner
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Set keys() — same as values()
Beginner
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Set keys() — spread to array
Beginner
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Set keys() — insertion order
Beginner
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Set keys() — empty Set
Beginner
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Set keys() — type of iterator
Beginner
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Set entries() — [value, value] pairs
Intermediate
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Set entries() — both elements are same
Intermediate
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Set entries() — spread to array
Intermediate
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Set entries() — empty Set
Beginner
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Set entries() — insertion order
Intermediate
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Set forEach() — collect values
Beginner
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Set forEach() — both args are the value
Intermediate
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Set forEach() — third arg is Set
Intermediate
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Set forEach() — empty Set is fine
Beginner
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Set forEach() — insertion order
Beginner
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Set union() — combined size
Intermediate
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Set union() — includes all elements
Intermediate
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Set union() — non-overlapping
Intermediate
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Set union() — empty union
Intermediate
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Set union() — originals unchanged
Intermediate
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Set intersection() — common elements
Intermediate
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Set intersection() — size
Intermediate
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Set intersection() — no common elements
Intermediate
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Set intersection() — originals unchanged
Intermediate
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Set intersection() — single common element
Intermediate
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Set difference() — elements in A not B
Intermediate
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Set difference() — size
Intermediate
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Set difference() — empty result
Intermediate
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Set difference() — B empty keeps A
Intermediate
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Set difference() — originals unchanged
Intermediate
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Set symmetricDifference() — elements in either but not both
Intermediate
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Set symmetricDifference() — size
Intermediate
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Set symmetricDifference() — identical sets → empty
Intermediate
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Set symmetricDifference() — disjoint = union
Intermediate
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Set symmetricDifference() — originals unchanged
Intermediate
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Set isSubsetOf() — subset is true
Intermediate
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Set isSubsetOf() — non-subset is false
Intermediate
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Set isSubsetOf() — empty set is subset of everything
Intermediate
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Set isSubsetOf() — equal sets are subsets
Intermediate
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Set isSubsetOf() — single element check
Intermediate
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Set isSupersetOf() — superset is true
Intermediate
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Set isSupersetOf() — non-superset is false
Intermediate
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Set isSupersetOf() — every set is superset of empty
Intermediate
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Set isSupersetOf() — equal sets are supersets
Intermediate
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Set isSupersetOf() — single element check
Intermediate
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Set isDisjointFrom() — disjoint is true
Intermediate
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Set isDisjointFrom() — non-disjoint is false
Intermediate
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Set isDisjointFrom() — empty set is disjoint from everything
Intermediate
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Set isDisjointFrom() — overlapping sets
Intermediate
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Set isDisjointFrom() — identical sets are not disjoint
Intermediate