Question

I am using dictionary for storing ID,otherID and bool value. Unfortunately it compares array reference, therefore I cannot use it.
Is there any way how to have an array as key but compare its values instead of reference?
Thanks

Answer 1

You can use the Comparer property of the dictionary to set it to a custom comparer created by you.

EDIT: actually the property is read-only, sorry. You should definitely use the proper constructor:

class IntArrayComparer : IEqualityComparer<int[]> {
    public bool Equals(int[] x, int[] y) {
        if (x.Length != y.Length) {
            return false;
        }
        for (int i = 0; i < x.Length; ++i) {
            if (x[i] != y[i]) {
                return false;
            }
        }
        return true;
    }
    public int GetHashCode(int[] obj) {
        int ret = 0;
        for (int i = 0; i < obj.Length; ++i) {
            ret ^= obj[i].GetHashCode();
        }
        return ret;
    }
}
static void Main(string[] args) {
    Dictionary<int[], bool> dict = new Dictionary<int[], bool>(new IntArrayComparer());
}