价值未定义？

Question

我的代码存在问题。尝试了一段时间从一个或多个对象获取值。我正在使用循环来从对象中获取数组中的每个值。当我在值上硬编码位置时，我得到了值，但是当我在循环中使用值'num'时未定义？

for(var num = 0; num <= 6; num++){
  // sets the date from the start of the week.
  newDate = moment().startOf('week').weekday(num).toDate();

  if(timesheet.timesheet.start[num] === ''){
    ....
  } else { 
    Times.create(timesheet, function(err, newTimes) {
      if(err){
        console.log(err); 
      } else {
        newTimes.timesheet.id = newTimesheet.id;
        // Prints the value fine
        console.log(timesheet.timesheet.start[0]);
        // Gives me undefined?
        newTimes.start = timesheet.timesheet.start[num];
        newTimes.end = "On";
        newTimes.save();
        newTimesheet.times.push(newTimes);
        newTimesheet.save();
      }

    }); 
  }
}