Question

我想比较本周和上周数据的动物数量百分比，但我坚持比较算法。我只能生成数据。

let data = []
for (let i = 0; i < 14; i++) {

  let dog_count = _.random(0, 100),
    cat_count = _.random(0, 100)
  data.push({
    date: moment().subtract(i, 'd').format('YYYY-MM-DD'),
    total_count: dog_count + cat_count,
    dog_count,
    cat_count

  })
}

https://jsfiddle.net/xrx2aebx

我试图实现的输出是这个

...
[{
date: '2017-8-10',
dog: {
    percentage: 67,
    indicator: 1 //1 means greater, 0 means equal, -1 means lesser
},
cat: {
    percentage: 33,
    indicator: -1
}]
...

Answer 1

我使用了部分你的代码并添加了一些想法试图设置你的预期输出。我想这就是你想要的。你可以很多地改进代码，它是在5分钟内完成的。

let data = [];

for (let i = 0; i < 14; i++) {
    let dog = [];
    let cat = [];
  let dog_count = _.random(0, 100),
  cat_count = _.random(0, 100)
  var total_count = dog_count + cat_count;

  var cat_count_perc = cat_count/total_count;
  var dog_count_perc = dog_count/total_count;
  var cat_int = 0;
  var dog_int = 0;

  if(dog_count_perc > cat_count_perc)
  {
    dog_int = 1;
    cat_int = -1;
  }else if (cat_count_perc > dog_count_perc)
  {
    dog_int = -1;
    cat_int = 1;
  }
  dog.push({
  percentage: dog_count_perc.toFixed(2),
  indicator: dog_int
  });
  cat.push({
  percentage: cat_count_perc.toFixed(2),
  indicator: cat_int
  })
  data.push({
    date: moment().subtract(i, 'd').format('YYYY-MM-DD'),
    dog: dog,
    cat: cat

  })
}
console.log(data);

jsfiddle ：https://jsfiddle.net/xrx2aebx/1/

Answer 2

这是伪代码

1. Generate last week's data, ordered by date(let lastWeekData)
2. Generate current week's data, ordered by date(let currentWeekData)
3. declare output array(let output = [])
4. for(var i=0;i< currentWeekData.length;i++){
    var currentOutput = {date: currentWeekData[i].date, dog: {},cat: {}};
    currentOutput.dog.percentage = currentWeekData[i].dog_Count / lastWeekData[i].dog_Count * 100; //here you need to change the percentage formula based on your requirement
    currentOutput.cat.percentage = currentWeekData[i].cat_Count / lastWeekData[i].cat_Count * 100;
    output.push(currentOutput);
}

相应地更改百分比公式。

使用循环比较本周和上周

2 个答案: