Next, let's convert that array of strings into an array of doubles using a different approach; to do this, enter the following below this line:
double[] doubleVals = Array.ConvertAll(vals, new Converter<string, double>(FromStringToDouble));
Notice the ConvertAll method. It's not so easy to use. You need to have an array on which you'll operate. So, in this case, the array is called vals, and then there needs to be something called a converter object (note that the popup shows Converter<TInput, TOutput> converter>). To make a converter, you enter new Converter, and then, in this case, you will transform an array of strings into an array of doubles. So, string is the one you're converting from, and double is the type to which you are converting. This new converter really just wraps a function call, so after that you enter (FromStringToDouble).
The preceding line will accomplish the conversion of the array from one data type to another. Remember, ultimately, it'll grab each value and hit it with Convert.ToDouble(s) from the line near the top.
Next, enter the following:
CompareValues compareValues = (xin, yin) =>
Here, CompareValues is a delegate type—it's like a data type—and we'll name it compareValues, and then you define a new Lambda (xin, yin)=>.