icomparer

Use own IComparer with Linq OrderBy

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Your comparer looks wrong to me. You’re still just sorting in the default text ordering. Surely you want to be parsing the two numbers and sorting based on that: public int Compare(Object stringA, Object stringB) { string[] valueA = stringA.ToString().Split(“https://stackoverflow.com/”); string[] valueB = stringB.ToString().Split(“https://stackoverflow.com/”); if (valueA.Length != 2 || valueB.Length != 2) { stringA.ToString().CompareTo(stringB.ToString()); } … Read more

Using IComparer for sorting

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You need to implement the strongly type interface (MSDN). public class CoordinatesBasedComparer : IComparer<Point> { public int Compare(Point a, Point b) { if ((a.x == b.x) && (a.y == b.y)) return 0; if ((a.x < b.x) || ((a.x == b.x) && (a.y < b.y))) return -1; return 1; } } BTW, I think you use … Read more

difference between IComparable and IComparer [duplicate]

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As the name suggests, IComparable<T> reads out I’m comparable. IComparable<T> when defined for T lets you compare the current instance with another instance of same type. IComparer<T> reads out I’m a comparer, I compare. IComparer<T> is used to compare any two instances of T, typically outside the scope of the instances of T. As to … Read more

Pass a lambda expression in place of IComparer or IEqualityComparer or any single-method interface?

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I’m not much sure what useful it really is, as I think for most cases in the Base Library expecting an IComparer there’s an overload that expects a Comparison… but just for the record: in .Net 4.5 they’ve added a method to obtain an IComparer from a Comparison: Comparer.Create so you can pass your lambda … Read more

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