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C# Intermediate C# Polymorphism Virtual Properties

Posted by Gerald Tinney
Gerald Tinney
15,454 Points

HELP, mind block, not even sure where to start!

any ideas?

RepeatDetector.cs 
namespace Treehouse.CodeChallenges
{
    class RepeatDetector : SequenceDetector
    {
        public override bool Scan(int[] sequence)
        {
            if(sequence.Length < 2)
            {
                return false;
            }

            for(int i = 1; i < sequence.Length; ++i)
            {
                if(sequence[i] == sequence[i-1])
                {
                    return true;
                }
            }

            return false;
        }
    }
}
SequenceDetector.cs 
namespace Treehouse.CodeChallenges
{
    class SequenceDetector
    {
        public string Description => "";

        public virtual bool Scan(int[] sequence)
        {
            return true;
        }
    }
}

1 Answer

Jason Nestmann
Jason Nestmann
22,538 Points
Jason Nestmann
Jason Nestmann
22,538 Points

Overriding virtual properties works similar to overriding virtual methods. First, you'll want to set the property in the base class to be virtual by adding the virtual keyword. Then in the subclass you create the override.

For this challenge add the virtual keyword to the property. Then copy the property into the subclass and change virtual to override. Finally replace the blank string "" with "Detects repetitions".

Once finished the property in SequenceDetector.cs would be public virtual string Description => ""; and RepeatDetector.cs would read public override string Description => "Detects repetitions";