个回答

• 慕桂英6274805

  2018-10-15 15:23:58

  已采纳

  数组定义错了

  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']];

  
  

  0

• qq_VeryHandSome_0

  2018-11-01 10:55:58

  <script type="text/javascript">

    var myarr =[['一号','男','大一',21],

    ['二号','女','大二',22],['三号','男','大三',23],

    ['四号','女','大四',24]]

    for (var i=0;i<myarr.length;i++) {

    if(myarr[i][1]=='女' && myarr[i][2]=='大二'){

    document.write(myarr[i]+"<br />");

    }

    }

   

  </script>

  
  

  0

• python_不屈菜鸟

  2018-10-30 16:17:38

  你的for循环错了 要不从1开始 要不你就去掉等于

  0

• fewer_xie

  2018-10-15 10:55:30

  infos[]=[[],[],[]]

  0