2018-10-10 22:03:03 +00:00
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---
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id: a77dbc43c33f39daa4429b4f
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2021-03-05 02:55:32 +00:00
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title: 基本类型布尔值的检查
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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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2021-03-05 02:55:32 +00:00
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检查一个值是否是基本类型中的布尔值(boolean)类型。 函数应返回 `true` 或者 `false`。
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2021-01-12 16:18:51 +00:00
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2021-03-05 02:55:32 +00:00
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基本类型中的布尔值为 `true` 或者 `false`。
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2020-12-16 07:37:30 +00:00
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# --hints--
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2021-03-05 02:55:32 +00:00
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`booWho(true)` 应返回 `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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2021-03-05 02:55:32 +00:00
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`booWho(false)` 应该返回 `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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2021-03-05 02:55:32 +00:00
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`booWho([1, 2, 3])` 应该返回 `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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2021-03-05 02:55:32 +00:00
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`booWho([].slice)` 应该返回 `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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2021-03-05 02:55:32 +00:00
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`booWho({ "a": 1 })` 应该返回 `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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2021-03-05 02:55:32 +00:00
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`booWho(1)` 应该返回 `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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2021-03-05 02:55:32 +00:00
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`booWho(NaN)` 应该返回 `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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2021-03-05 02:55:32 +00:00
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`booWho("a")` 应该返回 `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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2021-03-05 02:55:32 +00:00
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`booWho("true")` 应该返回 `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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2021-03-05 02:55:32 +00:00
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`booWho("false")` 应该返回 `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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