就近值 reduce用法 时间戳与时间点对比循环查找

后台接口返回的13为时间戳
需要与数据data的time做对比，查找出最近的值
data的数据结构如下：

将：改为空格，变成数字之间的对比

//查找最近的时间
    getNearestTime(timestamp, data) {
      let date = new Date(timestamp)
      let h = date.getHours()
      let m = (date.getMinutes() < 10 ? '0' + date.getMinutes() : date.getMinutes())
      let hm = parseInt(h + '' + m)
      let nearestTime = ''
      let distance = 1000000
      for (let i in data) {
        let time = parseInt(data[i].time.replace(':', ''))
        let dis = Math.abs(hm - time)
        if (dis < distance) {
          distance = dis
          nearestTime = data[i].time
        }
      }
      return nearestTime
    },

let nearestWakeupTimeStart = this.getNearestTime(wakeupTimeStart, this.heartListData)

infos(timestamp, data){
      let date = new Date(timestamp)
      let h = date.getHours() < 10 ? '0' + date.getHours() : date.getHours()
      let m = date.getMinutes() < 10 ? '0' + date.getMinutes() : date.getMinutes()
      let targetDate = h + '' + m

      var closestDate = data.reduce((prev, curr) => {
        var prevDiff = Math.abs(targetDate - prev.time.replace(':', ''));
        var currDiff = Math.abs(targetDate - curr.time.replace(':', ''));
        return currDiff < prevDiff ? curr : prev;
      });
      return closestDate.time
    },

let nearestWakeupTimeStarts =  this.infos(wakeupTimeStart, this.heartListData)