个回答

• 彼岸花开灬忆流年

  2017-11-20 11:13:18

  已采纳

  你的j不可能同时取两个值，假如匹配["小A","女","21","大一"]，你的  if((infos[0][3]=="大一" )&&(infos[0][1]=="女"))，j值怎么可能在一次循环中即取到3又取到1呢，可以这样

  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","男","23","大三"],["小F","女","24","大四"],["小G","男","23","大一"],
      ["小H","男","21","大一"],["小I","女","23","大四"],["小J","男","22","大二"]];
      for(var i=0;i<infos.length;i++)  {
          for(var j=0;j<infos[i].length;j++)  {
              if(infos[i][j]=="大一" ) {     //匹配到大一学生
                         if(infos[i][1]=="女"){     //再匹配大一学生中的女生
                        document.write("大一女生："+infos[i]+"<br />");
               }
            }
          }
      }

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• 沐沐幕

  2018-01-13 16:59:05

  ···

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