回答編集履歴
2
index
test
CHANGED
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@@ -4,9 +4,9 @@
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4
4
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5
5
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Object.defineProperty(Array.prototype, key, {
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6
6
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7
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-
value: function (
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7
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+
value: function (index) {
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8
8
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9
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-
return "キー値は" +
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9
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+
return "キー値は" + index;
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10
10
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11
11
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}
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12
12
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1
/
test
CHANGED
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@@ -2,19 +2,13 @@
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2
2
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3
3
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const key = Symbol('key');
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4
4
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5
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-
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6
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-
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7
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-
function _key(index) {
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8
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-
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9
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-
return 'key値は' + index + '&' + '値は' + this[index];
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10
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-
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11
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-
}
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12
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-
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13
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-
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14
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-
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15
5
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Object.defineProperty(Array.prototype, key, {
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16
6
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17
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-
value:
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7
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+
value: function (key) {
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8
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+
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9
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+
return "キー値は" + key;
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10
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+
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11
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+
}
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18
12
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19
13
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});
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20
14
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@@ -24,7 +18,7 @@
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24
18
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25
19
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26
20
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27
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-
arr[key](2) // => '
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21
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+
arr[key](2) // => 'キー値は2'
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28
22
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29
23
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```
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30
24
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