问答详情
源自：3-8 编程练习

for(i=0;i<arr.length;i++){ document.write(arr[i]+'<br/>'); }

最后打印出数组为什么是document.write(arr[i]）而不是document.write(arr）
arr[i]表示什么意思？


提问者：qq_iDIotlive_14401682 2016-12-01 17:50

个回答

  • xuyingxuying
    2016-12-01 18:24:17
    已采纳

    你要是打印arr的话，会循坏出n次arr数组的

    0
  • qq_崔俊_0
    2016-12-01 19:59:41

    //数据源
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"]];
//定义空数组接数据
var arr = [];
for(var i=0;i<infos.length;i++){
    //用if过滤
    if(infos[i][3] == '大一'){
        arr.push(infos[i]);
    }
}
document.write(arr);

    你的意思是不是这样？

    2
  • xuyingxuying
    2016-12-01 18:23:29

    你要是打印arr的话，会循坏出n次rr数组的

    0