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How can I reduce the length of my conditionals in my JavaScript? 

let getSlotList = [];
    if (
      res.data.hasOwnProperty('alley') &&
      res.data.hasOwnProperty('booked') &&
      res.data.hasOwnProperty('reminder')
    ) {
      getSlotList = [
        ...res.data.alley,
        ...res.data.booked,
        ...res.data.reminder,
      ];
    } else if (
      res.data.hasOwnProperty('alley') &&
      res.data.hasOwnProperty('booked')
    ) {
      getSlotList = [...res.data.alley, ...res.data.booked];
    } else if (
      res.data.hasOwnProperty('booked') &&
      res.data.hasOwnProperty('reminder')
    ) {
      getSlotList = [...res.data.reminder, ...res.data.booked];
    } else if (
      res.data.hasOwnProperty('alley') &&
      res.data.hasOwnProperty('reminder')
    ) {
      getSlotList = [...res.data.alley, ...res.data.booked];
    } else if (res.data.hasOwnProperty('alley')) {
      getSlotList = [...res.data.alley];
    } else if (res.data.hasOwnProperty('reminder')) {
      getSlotList = [...res.data.reminder];
    } else if (res.data.hasOwnProperty('booked')) {
      getSlotList = [...res.data.booked\];
    }

    console.log(
      '🚀 ~ file: ScheduleTab.js:66 ~ handleGetSlotsList ~ getSlotList',
      getSlotList,
    );
Via Active questions tagged javascript - Stack Overflow https://ift.tt/2HwmLzr
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