这样应该比较简单吧
落叶萧萧online
2017-09-23 21:44
<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']];
//第一步把之前的数据写成一个数组的形式,定义变量为 infos
for(var i=0;i<10;i++){
if(infos[i][3]=="大一"&&infos[i][1]=="女"){
document.write(infos[i][0]+"<br>");
}
}
//第一次筛选，找出都是大一的信息
//第二次筛选，找出都是女生的信息
</script>2回答
-
- 慕九州4633389
- 2017-09-23 21:58:42
<!DOCTYPE HTML>
<html >
<head>
<meta http-equiv="Content-Type" content="text/html; charset=utf-8" />
<title>流程控制语句</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"]
];
//第一步把之前的数据写成一个数组的形式,定义变量为 infos
for(var i=0;i<infos.length;i++){
if(infos[i][3]!="大一"){
infos.splice(i,1);
i=i-1;
}
}
//第一次筛选，找出都是大一的信息
for(var j=0;j<infos.length;j++){
if(infos[j][1]!="女"){
infos.splice(j,1);
j=j-1;
}
}
//第二次筛选，找出都是女生的信息
document.write(infos);
</script>
</head>
<body>
</body>
</html>
-
- qq_xy_29
- 2017-11-01 10:43:56
请问一下那个 i=i-1; j=j-1;是什么意思，我没理解到这里。为什么要自减啊
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