回答編集履歴
1
修正
test
CHANGED
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@@ -28,7 +28,7 @@
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```JavaScript
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-
return prev[current] = prev[current] ? prev[current] + 1 : 0 && prev
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+
return (prev[current] = prev[current] ? prev[current] + 1 : 0 + 1) && prev
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```
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