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Apprentice

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Exam →Stats →Learning Path

WeakMap

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Exercises (25)

○WeakMap — instanceof
Beginner
○WeakMap — typeof
Beginner
○WeakMap — set and get
Beginner
○WeakMap — iterable constructor
Intermediate
○WeakMap — non-object key throws
Intermediate
○WeakMap.prototype.set() — basic
Beginner
○WeakMap.prototype.set() — returns WeakMap
Beginner
○WeakMap.prototype.set() — overwrite value
Beginner
○WeakMap.prototype.set() — multiple keys
Beginner
○WeakMap.prototype.set() — null value
Beginner
○WeakMap.prototype.get() — basic
Beginner
○WeakMap.prototype.get() — missing key returns undefined
Beginner
○WeakMap.prototype.get() — after delete
Beginner
○WeakMap.prototype.get() — object value
Beginner
○WeakMap.prototype.get() — different keys
Beginner
○WeakMap.prototype.has() — existing key
Beginner
○WeakMap.prototype.has() — missing key
Beginner
○WeakMap.prototype.has() — after delete
Beginner
○WeakMap.prototype.has() — null value
Beginner
○WeakMap.prototype.has() — different objects
Intermediate
○WeakMap.prototype.delete() — returns true
Beginner
○WeakMap.prototype.delete() — returns false
Beginner
○WeakMap.prototype.delete() — has() after delete
Beginner
○WeakMap.prototype.delete() — get() after delete
Beginner
○WeakMap.prototype.delete() — independent keys
Beginner