回答編集履歴
1
chousei
test
CHANGED
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@@ -1 +1,11 @@
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1
1
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めんどうならsplitしちゃうとか
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2
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+
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3
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+
```javascript
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4
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+
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5
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var str = "testest-";
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6
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+
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7
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var underCount = str.split(/_/).length-1;
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8
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+
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9
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console.log(underCount);
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10
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+
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11
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```
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