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C# Intermediate C# Polymorphism Virtual Methods

Posted by Roman Devera
Roman Devera
1,227 Points

Please, can someone help me with the error "Index was outside the bounds of the array" that I am getting?

Challenge Task 3 of 3 Override the Scan method to return true if any value in the array is a repeat of the value immediately preceding it.

SequenceDetector.cs 
namespace Treehouse.CodeChallenges
{
    class SequenceDetector
    {
        public virtual bool Scan(int[] sequence)
        {
            return true;

        }
    }
}
RepeatDetector.cs 
namespace Treehouse.CodeChallenges
{
class RepeatDetector: SequenceDetector
{
public override bool Scan(int[] sequence)
        {
            for (int i = 1; i <= sequence.Length; i++)
            {
                if (sequence[i] == sequence[i-1])
                return true;

            }
            return false;
         }
}

}

1 Answer

Dale Severude
seal-mask
.a{fill-rule:evenodd;}techdegree seal-36
Dale Severude
Full Stack JavaScript Techdegree Graduate 71,350 Points
Dale Severude
.a{fill-rule:evenodd;}techdegree seal-36
Dale Severude
Full Stack JavaScript Techdegree Graduate 71,350 Points

Hi Roman,

Your for loop is overflowing the bounds of the array. You have i <= sequence.Length, but it should be i < sequence.Length

Roman Devera
Roman Devera
1,227 Points

Great, it worked! Thank you very much Dale.