2018-10-10 22:03:03 +00:00
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---
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id: a77dbc43c33f39daa4429b4f
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2021-02-06 04:42:36 +00:00
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title: Boo who
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2018-10-10 22:03:03 +00:00
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challengeType: 5
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2021-01-12 16:18:51 +00:00
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forumTopicId: 16000
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2021-01-13 02:31:00 +00:00
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dashedName: boo-who
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2018-10-10 22:03:03 +00:00
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---
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2020-12-16 07:37:30 +00:00
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# --description--
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2021-02-06 04:42:36 +00:00
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Check if a value is classified as a boolean primitive. Return true or false.
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2021-01-12 16:18:51 +00:00
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2021-02-06 04:42:36 +00:00
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Boolean primitives are true and false.
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2020-12-16 07:37:30 +00:00
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# --hints--
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2021-02-06 04:42:36 +00:00
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`booWho(true)` should return true.
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2020-12-16 07:37:30 +00:00
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```js
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assert.strictEqual(booWho(true), true);
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```
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2021-02-06 04:42:36 +00:00
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`booWho(false)` should return true.
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2020-12-16 07:37:30 +00:00
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```js
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assert.strictEqual(booWho(false), true);
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```
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2021-02-06 04:42:36 +00:00
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`booWho([1, 2, 3])` should return false.
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2018-10-10 22:03:03 +00:00
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2020-12-16 07:37:30 +00:00
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```js
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assert.strictEqual(booWho([1, 2, 3]), false);
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2018-10-10 22:03:03 +00:00
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```
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2021-02-06 04:42:36 +00:00
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`booWho([].slice)` should return false.
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2018-10-10 22:03:03 +00:00
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2020-12-16 07:37:30 +00:00
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```js
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assert.strictEqual(booWho([].slice), false);
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```
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2018-10-10 22:03:03 +00:00
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2021-02-06 04:42:36 +00:00
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`booWho({ "a": 1 })` should return false.
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2018-10-10 22:03:03 +00:00
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```js
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2020-12-16 07:37:30 +00:00
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assert.strictEqual(booWho({ a: 1 }), false);
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```
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2018-10-10 22:03:03 +00:00
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2021-02-06 04:42:36 +00:00
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`booWho(1)` should return false.
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2018-10-10 22:03:03 +00:00
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2020-12-16 07:37:30 +00:00
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```js
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assert.strictEqual(booWho(1), false);
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2018-10-10 22:03:03 +00:00
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```
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2021-02-06 04:42:36 +00:00
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`booWho(NaN)` should return false.
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2018-10-10 22:03:03 +00:00
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2020-12-16 07:37:30 +00:00
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```js
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assert.strictEqual(booWho(NaN), false);
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```
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2018-10-10 22:03:03 +00:00
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2021-02-06 04:42:36 +00:00
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`booWho("a")` should return false.
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2018-10-10 22:03:03 +00:00
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2020-12-16 07:37:30 +00:00
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```js
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assert.strictEqual(booWho('a'), false);
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```
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2018-10-10 22:03:03 +00:00
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2021-02-06 04:42:36 +00:00
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`booWho("true")` should return false.
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2018-10-10 22:03:03 +00:00
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```js
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2020-12-16 07:37:30 +00:00
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assert.strictEqual(booWho('true'), false);
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```
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2019-12-20 15:20:46 +00:00
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2021-02-06 04:42:36 +00:00
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`booWho("false")` should return false.
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2020-12-16 07:37:30 +00:00
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```js
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assert.strictEqual(booWho('false'), false);
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2018-10-10 22:03:03 +00:00
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```
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2020-08-13 15:24:35 +00:00
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2021-01-13 02:31:00 +00:00
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# --seed--
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## --seed-contents--
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```js
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function booWho(bool) {
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return bool;
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}
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booWho(null);
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```
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2020-12-16 07:37:30 +00:00
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# --solutions--
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2021-01-13 02:31:00 +00:00
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```js
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function booWho(bool) {
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return typeof bool === "boolean";
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}
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booWho(null);
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```
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