回答編集履歴
2
チェック
test
CHANGED
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@@ -31,3 +31,39 @@
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31
31
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<div id="d4" data-arr="[null]"></div>
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32
32
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33
33
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```
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34
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+
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35
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+
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36
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+
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37
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+
# 数値をチェック
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38
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+
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39
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+
isNaNのチェックでは数値で構成される文字列を弾けません
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40
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+
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41
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+
```javascript
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42
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+
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43
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+
<script>
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44
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+
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45
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+
$(function(){
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46
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+
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47
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+
var arr=[];
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48
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+
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49
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+
arr=$('#d1').data('arr').filter(function(x){return typeof x=="number";});console.log(arr);
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50
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+
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51
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+
arr=$('#d2').data('arr').filter(function(x){return typeof x=="number";});console.log(arr);
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52
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+
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53
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+
arr=$('#d3').data('arr').filter(function(x){return typeof x=="number";});console.log(arr);
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54
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+
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55
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+
arr=$('#d4').data('arr').filter(function(x){return typeof x=="number";});console.log(arr);
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56
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+
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57
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+
});
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|
58
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+
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59
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+
</script>
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60
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+
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61
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+
<div id="d1" data-arr="[]"></div>
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62
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+
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63
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+
<div id="d2" data-arr="[1,2,3]"></div>
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|
64
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+
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65
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+
<div id="d3" data-arr='["a","b","c"]'></div>
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66
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+
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67
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+
<div id="d4" data-arr='["1",2,"c"]'></div>
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68
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+
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69
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+
```
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1
sample
test
CHANGED
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@@ -1 +1,33 @@
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1
1
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「arr="[]"」属性「data('arr')」ではありません
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2
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+
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3
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+
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4
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+
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5
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+
# sample
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|
6
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+
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7
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+
```javascript
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8
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+
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9
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+
<script>
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|
10
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+
|
|
11
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+
$(function(){
|
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12
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+
|
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13
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+
console.log($('#d1').data('arr').length>0);
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14
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+
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15
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+
console.log($('#d2').data('arr').length>0);
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16
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+
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17
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+
console.log($('#d3').data('arr').length>0);
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18
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+
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19
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+
console.log($('#d4').data('arr').length>0);
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20
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+
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21
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+
});
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22
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+
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23
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+
</script>
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24
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+
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25
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+
<div id="d1" data-arr="[]"></div>
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26
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+
|
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27
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+
<div id="d2" data-arr="[1,2,3]"></div>
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28
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+
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|
29
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+
<div id="d3" data-arr="[0]"></div>
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30
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+
|
|
31
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+
<div id="d4" data-arr="[null]"></div>
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|
32
|
+
|
|
33
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+
```
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