2回答

• 

  qaza2008

  2016-09-22 16:54:26

  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"]];

  
  

  infos.forEach(function(item){

  if(item[3]=="大一"){

  if(item[1]=="女"){

  document.write(item[0]+"<br>")

  }

  }

  })

  一维数组 var arr=[1,2,3,4];

  二维数组 var arr2=[[1,2,3,4],[5,6,7,8,9,10]] ,二维只是代表一个xy矩阵

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• 

  qq_o黯淡_04019801

  2016-09-22 16:54:08

  你吧那4个看成一个整体.就好比一个盒子里面装的有4个东西.

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