Quizze » Werte

1. Primitive Werte vs. Objekte

Welche der folgenden Ausdrücke erzeugen Objekte?

'abc'

{}

[true, false]

null

2. Gleichheit

Welche Aussagen gelten?

assert.ok('abc' === 'abc')

assert.ok(123 === 123)

assert.ok({} === {})

3. `typeof`

const result = typeof '';

Was passiert?

assert.equal(result, 'object')

assert.equal(result, 'string')

TypeError

4. `typeof`

const result = typeof [];

Was passiert?

assert.equal(result, 'object')

assert.equal(result, 'array')

TypeError

5. `typeof`

const result = typeof function () {};

Was passiert?

assert.equal(result, 'object')

assert.equal(result, 'function')

TypeError

6. `typeof`

const result = typeof null;

Was passiert?

assert.equal(result, 'object')

assert.equal(result, 'null')

TypeError

7. `instanceof`

const result = '' instanceof String;

Was passiert?

assert.equal(result, false)

assert.equal(result, true)

TypeError

8. `instanceof`

const result = [] instanceof Array;

Was passiert?

assert.equal(result, false)

assert.equal(result, true)

TypeError

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Quizze » Werte

1. Primitive Werte vs. Objekte

2. Gleichheit

3. typeof

4. typeof

5. typeof

6. typeof

7. instanceof

8. instanceof

3. `typeof`

4. `typeof`

5. `typeof`

6. `typeof`

7. `instanceof`

8. `instanceof`