回答編集履歴
1
情報の追加。
test
CHANGED
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@@ -9,3 +9,23 @@
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9
9
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10
10
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11
11
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【MDN】[Array.prototype.fill()](https://developer.mozilla.org/ja/docs/Web/JavaScript/Reference/Global_Objects/Array/fill), [Array.prototype.map()](https://developer.mozilla.org/ja/docs/Web/JavaScript/Reference/Global_Objects/Array/map), [Array.prototype.reduce()](https://developer.mozilla.org/ja/docs/Web/JavaScript/Reference/Global_Objects/Array/reduce), [Array.prototype.push()](https://developer.mozilla.org/ja/docs/Web/JavaScript/Reference/Global_Objects/Array/push)
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12
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+
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13
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14
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+
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15
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---
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16
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+
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17
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+
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18
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19
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**追記：**
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20
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+
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21
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+
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22
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+
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23
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もう少し短くなるかと思ったがそうでもなかった。
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24
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+
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25
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```js
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26
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27
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const arr = new Array( 24 ).fill( null ).reduce( ( s, c, i )=> ( c = ( '0' + i ).slice( -2 ), s + `${c}:00,${c}:30,` ), '' ).split( ',', 48 );
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28
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+
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29
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console.log( arr );
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30
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31
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```
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