javascript - js生成随机数据

Question

初涉 Js，想生成一组随机数据，基本的数据格式如下：

 var test_data = {
    "data": [{
        "seq": 36687,
        "vol": [63.27994918823242, 63.282066345214844, 63.28112030029297, 63.27827453613281, 63.27593231201172],
        "time": "2012-07-18-21-42-13-034",
        "hrate": 0,
        "status": 0
    },{
        "seq": 36688,
        "vol": [63.24958038330078, 63.249080657958984, 63.25041580200195, 63.25270080566406, 63.254817962646484],
        "time": "2012-07-18-21-42-13-072",
        "hrate": 0,
        "status": 0
    }],
}; 

问题： 我想随机生成 test_data，大概10万行， 纯js代码， seq是自增1，vol为5个随机数字，hrate和status均为0不变，time则是最后3个数字随机变化 （例子中为 42-13-034随机变化）

谢谢！！

Answer 1

<script>
 var test_data = { data: [] };
 var data = test_data.data;
 for(var i = 36687; i < 36687 + 100000; i++){
    var temp = {
        seq: i,
        vol: getVol(),
        time: "2012-07-18-21-42-13-0" + getNum(),
        hrate: 0,
        status: 0
    }
    data.push(temp)
 }
 function getNum(){
  var num = parseInt(Math.random()*100)
  if(num < 10){
    num = "0" + num;
  }
  return num.toString();
 }
 function getVol(){
   var arr = [], i = 0;
   while(i < 5){
    arr.push(Math.random()*100);
    i++;
   }
   return arr;
 }
</script>

循环即可.

Answer 2

随机数的格式自己再造造

function test() {
    var arr = [];
    for (var i = 0; i < 100000; i++) {
        var date = new Date();
        var random = Math.random;
        var time = date.toLocaleDateString() + '-' + date.toLocaleTimeString().split(':').join('-') + '-' + Math.floor(random()*1000);
        arr.push({
            "seq": i,
            "time": time,
            "hrate": 0,
            "status": 0,
            "vol": [random(), random(), random(), random(), random()]
        })
    }
    return {
        "data": arr
    }
}

Answer 3

// 初始化你的数据
var time = 36687;
var times = time + 1000000;
var data = [];
var now = "2012-07-18-21-42-13-";
for (let m = time; m < times; m++) {
    var d = {
        hrate: 0,
        status: 0,
        vol: []
    };
    d.seq = time;
    for (let i = 0; i < 5; i++) {
        d.vol.push(Math.random() * 100);
    }
    var rand = '';
    for (let i = 0; i < 3; i++) {
        const r = Math.floor(Math.random() * 10);
        rand += r;
    }
    d.time = now + rand;
    time++;
    data.push(d);
};
console.log(data);