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C# Intermediate C# Polymorphism Virtual Properties

Posted by jose rego
jose rego
2,663 Points

Having Trouble with Challange Task 1 of 1 Virtual Properties? Hint! Read Question very carefully. :).

For those that get stuck on Intermediate C# -> Polymorphism -> Virtual Properties (Challenge Task 1 of 1) re-read this question slowly and see what you enter is exactly what it ask for. Check syntax, spelling, capitalization(hint!) and you be good... Once will just smack yourself for this one.

Question: SequenceDetector now contains a Description property. In RepeatDetector, override the Description property to return "Detects repetitions".

Will give you a real good hint.. They are with " " in the question.

RepeatDetector.cs 
namespace Treehouse.CodeChallenges
{
    class RepeatDetector : SequenceDetector
    {
        public override string Description => "Detects Repetitions";

        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 virtual string Description => "";

        public virtual bool Scan(int[] sequence)
        {
            return true;
        }
    }
}
Steven Parker
Steven Parker
231,268 Points
Steven Parker
Steven Parker
231,268 Points

It's always best to follow the directions. :smile:

I can't count how many times someone ran into trouble by writing something that compiles, but is not what the challenge asked for!

1 Answer

Alan Mattanó
PLUS
Alan Mattanó
Courses Plus Student 12,188 Points
Alan Mattanó
Alan Mattanó
Courses Plus Student 12,188 Points

Just put override in front of the variable (of child class). Remember to check if the parent master class variable is virtual. Is it virtual? if not include virtual to the variable in the class SequenceDetector