回答編集履歴
1
追記
test
CHANGED
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@@ -6,7 +6,7 @@
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6
6
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7
7
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b = [elm1,elm2,elm3];
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8
8
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9
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-
a = b.concat();
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9
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+
a = b.concat(); console.log(a===b); //false
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10
10
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11
11
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elm1[0] = 0; console.log(a[0][0]); //0
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12
12
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