Created
July 5, 2017 23:54
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| public int BinarySearch<T>(IList<Tuple<T, double>> values, T value, IComparer<T> comparer = null) { | |
| if (values.Count == 0) return -1; | |
| if (comparer == null) comparer = Comparer<T>.Default; | |
| var lower = 0; | |
| var upper = values.Count - 1; | |
| while (lower <= upper) { | |
| var mid = (lower + upper) / 2; | |
| var result = comparer.Compare(value, values[mid].Item1); | |
| if (result == 0) return mid; | |
| else if (result < 0) { // value < values[mid] | |
| upper = mid - 1; | |
| } else { // value > values[mid] | |
| lower = mid + 1; | |
| } | |
| } | |
| return ~lower; | |
| } |
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