回答編集履歴
1
String 型への変換処理を追加
test
CHANGED
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@@ -10,7 +10,7 @@
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10
10
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11
11
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function calc (arithmeticOperator) {
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13
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-
switch (arithmeticOperator) {
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13
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+
switch (String(arithmeticOperator)) {
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case '+':
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