var data = ['ab', 'c'];

function handleData ( arg ){
    var data = arg;
    console.log(data.length);
}

数组里面是字符串没问题，但是换成json对象，就无法正确获取长度

var data01 =[{"mid":1,"name":"我的世界里","content":"你的家","pubtime":"2018-10-21T17:32:57.000Z","examine":0},{"mid":2,"name":"填空王力宏","content":"招聘求职信息","pubtime":"2018-10-21T17:33:52.000Z","examine":0},{"mid":3,"name":"填空王力宏","content":"招聘求职信息","pubtime":"2018-10-21T17:34:57.000Z","examine":0},{"mid":4,"name":"填空王力宏","content":"招聘求职信息","pubtime":"2018-10-21T17:35:50.000Z","examine":0},{"mid":5,"name":"填空王力宏","content":"招聘求职信息","pubtime":"2018-10-21T18:00:04.000Z","examine":0},{"mid":6,"name":"填空王力宏","content":"招聘求职信息","pubtime":"2018-10-21T18:03:37.000Z","examine":0},{"mid":7,"name":"填空王力宏","content":"招聘求职信息","pubtime":"2018-10-21T18:03:50.000Z","examine":0},{"mid":8,"name":"填空王力宏","content":"招聘求职信息","pubtime":"2018-10-21T18:05:12.000Z","examine":0},{"mid":9,"name":"填空王力宏","content":"招聘求职信息","pubtime":"2018-10-21T18:05:16.000Z","examine":0},{"mid":10,"name":"填空王力宏","content":"招聘求职信息","pubtime":"2018-10-21T18:05:50.000Z","examine":0},{"mid":11,"name":"填空王力宏","content":"招聘求职信息","pubtime":"2018-10-21T18:06:18.000Z","examine":0},{"mid":12,"name":"填空王力宏","content":"招聘求职信息","pubtime":"2018-10-21T18:17:37.000Z","examine":0},{"mid":13,"name":"填空王力宏","content":"招聘求职信息","pubtime":"2018-10-21T18:45:13.000Z","examine":0},{"mid":14,"name":"填空王力宏","content":"招聘求职信息","pubtime":"2018-10-21T18:45:18.000Z","examine":0},{"mid":15,"name":"填空王力宏","content":"招聘求职信息","pubtime":"2018-10-21T18:45:26.000Z","examine":0},{"mid":16,"name":"填空王力宏","content":"招聘求职信息","pubtime":"2018-10-21T18:45:41.000Z","examine":0}]


function handleData ( arg ){
    var data = arg;
    console.log(data.length);
}

输出结果是

data.length = 1493

但是我想要的结果是16

什么原因造成的