C#•2y ago

Expression returns false even though it should return true

Hi, I'm trying to check if a date is before now or after NOW. While debugging i can see that the expression doesn't return true even though it should.

16 Replies

Pobiega•2y ago

can you show the value of .Planned here?

Macke•2y ago

it's above the bigger screenshot @Pobiega

Pobiega•2y ago

right, really hard to see 😄 well, thats... very weird. I've never in my 20 years of programming encountered an actual "true is false" bug so I doubt we are seeing one here either

Macke•2y ago

hahah sorry, yea i'm kind of scratching my head. yea there must be something i'm doing wrong

TheBoxyBear•2y ago

There was another post yesterdya where the debugger showed "" != "" so could be a similar thing here? Assuming it's 10:52 or earlier where op lives then it doesn't make sense

Macke•2y ago

it's 12.52 pm here

TheBoxyBear•2y ago

Planned is for 11:40

Macke•2y ago

yea I guess i'll explain i have a list with objects and if time has passed past the .Planned property i want to remove it from the list

TheBoxyBear•2y ago

So even if DateTime.Now advances, it wouldn't change the outcome

Macke•2y ago

So i have objects i need to remove that are tomorrow and before the time that is now

List<int> indexestoremove = new List<int>();
        List<FlightData> data = GetData();
        if(data == null)
        {
            return null;
        }
        for (int y = 0; y < data.Count; y++)
        {
            if (data[y].Planned < DateTime.Now)
            {
                if (data[y].Estimated == null || data[y].Estimated < DateTime.Now || data[y].Planned.Date > DateTime.Now)
                {
                    indexestoremove.Add(y);
                }
                
            }
        }

        foreach (var item in indexestoremove)
        {
            data.RemoveAt(item);
        }

List<int> indexestoremove = new List<int>();
        List<FlightData> data = GetData();
        if(data == null)
        {
            return null;
        }
        for (int y = 0; y < data.Count; y++)
        {
            if (data[y].Planned < DateTime.Now)
            {
                if (data[y].Estimated == null || data[y].Estimated < DateTime.Now || data[y].Planned.Date > DateTime.Now)
                {
                    indexestoremove.Add(y);
                }
                
            }
        }

        foreach (var item in indexestoremove)
        {
            data.RemoveAt(item);
        }

TheBoxyBear•2y ago

Does it run the if anyway with a breakpoint? If so, then the debugger is messed up dviperShrug

Macke•2y ago

there's no exception and i'm not expecting there to be one

TheBoxyBear•2y ago

No exception, just if it enters the if block

Macke•2y ago

i'll check one sec oh my god i just saw it i'm so stupid It removes the objects that are before now but not after today But it's because I'm first checking if it's less than now and then checking if it's more than today so since it's not less than now it's never gonna reach the second if block it's at moments like this i'm wondering if i really should be doing this lol

TheBoxyBear•2y ago

We all make dumb mistakes

Macke•2y ago

quick question, do list indexes start at 0 or 1?

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Expression returns false even though it should return true