Conversion from List<T> to array T[]
C#.NetArraysLinqListC# Problem Overview
Is there a short way of converting a strongly typed List<T> to an Array of the same type, e.g.: List<MyClass> to MyClass[]?
By short i mean one method call, or at least shorter than:
MyClass[] myArray = new MyClass[list.Count];
int i = 0;
foreach (MyClass myClass in list)
{
myArray[i++] = myClass;
}
C# Solutions
Solution 1 - C#
Try using
MyClass[] myArray = list.ToArray();
Solution 2 - C#
List<int> list = new List<int>();
int[] intList = list.ToArray();
is it your solution?
Solution 3 - C#
Use ToArray() on List<T>.
Solution 4 - C#
list.ToArray()
Will do the tric. See here for details.
Solution 5 - C#
You can simply use ToArray() extension method
Example:
Person p1 = new Person() { Name = "Person 1", Age = 27 };
Person p2 = new Person() { Name = "Person 2", Age = 31 };
List<Person> people = new List<Person> { p1, p2 };
var array = people.ToArray();
> The elements are copied using Array.Copy(), which is an O(n) operation,
> where n is Count.
Solution 6 - C#
One possible solution to avoid, which uses multiple CPU cores and expected to go faster, yet it performs about 5X slower:
list.AsParallel().ToArray();
Solution 7 - C#
To go twice as fast by using multiple processor cores HPCsharp nuget package provides:
list.ToArrayPar();