Set: set.clear()

clear() removes all elements from a Set object.

set.size becomes 0

const set = new Set(); set.add('one').add(2); set.clear(); var actualSize; assert.equal(actualSize, set.size);

the iterator set.entries() will not contain any items

const set = new Set(); set.add('one').add(2); set.clear; const {done} = set.entries().next(); assert.equal(done, true);

any call to set.has() returns false

const set = new Set(); set.add('one').add(2); assert.deepEqual(set.has(2), false);

returns undefined

const set = new Set(); var actualReturn = true; assert.equal(actualReturn, set.clear());

Links

spec How the implementation is specified.
docs mdn The MDN docs.
announcement Announcement of this kata on twitter.

Required Knowledge

• `let` declaration (Block scope)
• `const` declaration (Block scope)
• object (Destructuring)
• basics (Set)
• `set.add()` (Set)

Related Katas

Set

• basics
• set.add()
• set.delete()
• the API
• set.clear()

Difficulty Level

BEGINNER

First Published

3 August 2015

Stats

4 tests to solve