Programming Basics: The for loop can do more than increment an integer
This is one of those small things that is easy to forget. Usually when we use a for loop, we’ll just incrment over an integer so that we can get a specific item out of some iteration. But you can do much more than that. My current project has a complicated scheduling component and I’m often working with a range of dates. I often need to do something with the days between two dates. I created a TimePeriod class that is created with a start and end date.
public class TimePeriod
private readonly DateTime _start;
private readonly DateTime _end;
public TimePeriod(DateTime start, DateTime end)
_start = start;
_end = end;
Now what I need to do is iterate over all of the days that are between these two dates. I was struggling with this for a while, trying get a clean implementation. Then I remembered that the for loop could do this for me. Instead of using the standard i++ of the loop action, I add a day to the iteration variable. Now I can get every day between the start and end date.
Once I had this in place, I was able to put on some more convenience methods to cut down on some repetitive tasks I was performing.
public bool Contains(DateTime dateTime)
public bool ContainsTheDayOfWeek(DayOfWeek dayOfWeek)
return DaysInPeriod().Any(d => d.DayOfWeek == dayOfWeek);
This was nothing Earth shattering, but a real simple abstraction made my life a lot easier.