回答編集履歴
2
まあ、いらないか。
test
CHANGED
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@@ -2,7 +2,7 @@
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2
2
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3
3
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```js
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4
4
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let result = "";
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5
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-
[...sample[0]
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5
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+
[...sample[0]].every((...[, i]) => sample.every(x => sample[0][i] === x[i]) ? result += sample[0][i] : false)
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6
6
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console.log(
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7
7
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result
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8
8
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)
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1
修正
test
CHANGED
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@@ -1 +1,10 @@
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1
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-
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1
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+
~~[...sample[0].slice(0, Math.min(...sample.map(x => x.length)))].filter((...[, i]) => sample.every(x => sample[0][i] === x[i])).join('')~~
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2
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+
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3
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+
```js
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4
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+
let result = "";
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5
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+
[...sample[0].slice(0, Math.min(...sample.map(x => x.length)))].every((...[, i]) => sample.every(x => sample[0][i] === x[i]) ? result += sample[0][i] : false)
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6
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+
console.log(
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7
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+
result
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8
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)
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9
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+
// "my_name_is_"
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10
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+
```
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