課程
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/JavaScript進階篇
實在是寫不出來。
2015-06-17
源自：JavaScript進階篇 4-10
正在回答
<!DOCTYPE ?HTML>
<html >
<head>
<meta http-equiv="Content-Type" content="text/html; charset="utf-8" />
<title>流程控制語句</title>
<script type="text/javascript">
var infos=[["小A","女","21","大一"],["小B","男","23","大三"],["小C","男","24","大四"],["小D","女","21","大一"],["小E","女","22","大四"],["小F","男","21","大一"],["小G","女","22","大二"],["小H","女","20","大三"],["小I","女","20","大一"],["小J","男","20","大三"],];?
?//第一次篩選，找出都是大一的信息
?var n=0;
?var myarr=[];
?for(var i=0;i<infos.length;i++)
?{
? ? ?if(infos[i][3]=="大一"){
? ? ? ? ?myarr[n]=infos[i];
? ? ? ? ?document.write(myarr[n]+"<br>");
? ? ? ? ?n=n+1;
? ? ?}
?}
?document.write(myarr.length+"<br>");?
?//第二次篩選，找出都是女生的信息
?for(var a=0;a<myarr.length;a++){
? ? switch(myarr[a][1]){
? ? case "女":
? ? document.write(myarr[a][0]+"<br>");
? ? break;
? ? default:
? ? }
??
</script>
</head>
<body>
</body>
</html>
qq_小白_7 提問者
舉報
本課程從如何插入JS代碼開始，帶您進入網頁動態交互世界
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2 回答請問這個用switch語句怎么寫呢？
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2015-06-27
<!DOCTYPE ?HTML>
<html >
<head>
<meta http-equiv="Content-Type" content="text/html; charset="utf-8" />
<title>流程控制語句</title>
<script type="text/javascript">
var infos=[["小A","女","21","大一"],["小B","男","23","大三"],["小C","男","24","大四"],["小D","女","21","大一"],["小E","女","22","大四"],["小F","男","21","大一"],["小G","女","22","大二"],["小H","女","20","大三"],["小I","女","20","大一"],["小J","男","20","大三"],];?
?//第一次篩選，找出都是大一的信息
?var n=0;
?var myarr=[];
?for(var i=0;i<infos.length;i++)
?{
? ? ?if(infos[i][3]=="大一"){
? ? ? ? ?myarr[n]=infos[i];
? ? ? ? ?document.write(myarr[n]+"<br>");
? ? ? ? ?n=n+1;
? ? ?}
?}
?document.write(myarr.length+"<br>");?
?//第二次篩選，找出都是女生的信息
?for(var a=0;a<myarr.length;a++){
? ? switch(myarr[a][1]){
? ? case "女":
? ? document.write(myarr[a][0]+"<br>");
? ? break;
? ? default:
? ? break;
? ? }
?}
??
</script>
</head>
<body>
</body>
</html>