Get the first and last item of an array of strings

Question

If I have the following array of strings:

string[] stringArray = {"one", "two", "three", "four"};

Is there a way to get the first and last item ("one", "four") in C# from the array, besides using array indexing (stringArray[0], stringArray[3]), something like stringArray.First and stringArray.Last ?

Answer 1

Use LINQ First() and Last() methods.

Moreover, both methods have useful overload which allows specifying boolean condition for elements to be considered as first or last.

Answer 2

string[] stringArray = { "one", "two", "three", "four" };
var last=stringArray.Last();
var first=stringArray.First();

Answer 3

There are stringArray.First() and stringArray.Last() as extension methods in the System.Linq namespace.

Answer 4

Different ways to get the first index from the array:

Console.WriteLine(stringArray.First());
Console.WriteLine(stringArray.ElementAt(0));
Console.WriteLine(stringArray[0]);
var stringEnum = stringArray.GetEnumerator();
if (stringEnum.MoveNext())
    Console.WriteLine(stringEnum.Current);

Different ways to get the last index from the array:

Console.WriteLine(stringArray.Last());
if (stringArray.Any())
    Console.WriteLine(stringArray.ElementAt(stringArray.Count()-1));
Console.WriteLine(stringArray[stringArray.Length -1]);
var stringEnum = stringArray.GetEnumerator();
string lastValue = null;
while (stringEnum.MoveNext())
    lastValue = (string)stringEnum.Current;
Console.WriteLine(lastValue);

Answer 5

You can use stringArray.GetUpperBound(0) to get the index of the last item.