回答編集履歴
2
GitHub
test
CHANGED
|
@@ -58,7 +58,7 @@
|
|
|
58
58
|
|
|
59
59
|
|
|
60
60
|
|
|
61
|
-
- [const-map.js
|
|
61
|
+
- [const-map.js - GitHub gist](https://gist.github.com/think49/6776d8cebf8d4ca75c7b935aec4f4b82)
|
|
62
62
|
|
|
63
63
|
|
|
64
64
|
|
1
ConstMap
test
CHANGED
|
@@ -1,3 +1,7 @@
|
|
|
1
|
+
### const
|
|
2
|
+
|
|
3
|
+
|
|
4
|
+
|
|
1
5
|
> 定数名appleのdiv要素、定数名orangeの〃、定数名grapeの〃をfor文を用いて作るにはどうすればいいのでしょうか
|
|
2
6
|
|
|
3
7
|
|
|
@@ -46,4 +50,48 @@
|
|
|
46
50
|
|
|
47
51
|
|
|
48
52
|
|
|
53
|
+
### ConstMap
|
|
54
|
+
|
|
55
|
+
|
|
56
|
+
|
|
57
|
+
まだ要件がはっきり見えませんが、期待しているのは下記コードのような動作ですか。
|
|
58
|
+
|
|
59
|
+
|
|
60
|
+
|
|
61
|
+
- [const-map.js: 定義済みの `key` の `set()` した時にエラーを発生させる `new Map` 互換オブジェクトを生成します](https://gist.github.com/think49/6776d8cebf8d4ca75c7b935aec4f4b82)
|
|
62
|
+
|
|
63
|
+
|
|
64
|
+
|
|
65
|
+
```HTML
|
|
66
|
+
|
|
67
|
+
<script src="./const-map-0.1.0.js"></script>
|
|
68
|
+
|
|
69
|
+
<script>
|
|
70
|
+
|
|
71
|
+
const keys = ['apple','orange','grape'];
|
|
72
|
+
|
|
73
|
+
const fruitMap = new ConstMap;
|
|
74
|
+
|
|
75
|
+
|
|
76
|
+
|
|
77
|
+
for (let i = 0, l = keys.length; i < l; ++i) {
|
|
78
|
+
|
|
79
|
+
fruitMap.set(keys[i], document.createElement('div'));
|
|
80
|
+
|
|
81
|
+
}
|
|
82
|
+
|
|
83
|
+
|
|
84
|
+
|
|
85
|
+
console.log(fruitMap.values()); // [div, div, div]
|
|
86
|
+
|
|
87
|
+
console.log(fruitMap.get('apple')); // <div></div>
|
|
88
|
+
|
|
89
|
+
console.log(fruitMap.set('apple', 'foo')); // DefinitionError: Identifier 'apple' has already been declared
|
|
90
|
+
|
|
91
|
+
</script>
|
|
92
|
+
|
|
93
|
+
```
|
|
94
|
+
|
|
95
|
+
|
|
96
|
+
|
|
49
97
|
Re: jjj001 さん
|