How do I truncate a list in C#?

user_365781 0
Viewed 14725

I know in python you can do something like myList[1:20] but is there anything similar in C#?

truncate list c#
6 Answers

This might be helpful for efficiency, if you really want to truncate the list, not make a copy. While the python example makes a copy, the original question really was about truncating the list.

Given a List<> object "list" and you want the 1st through 20th elements

list.RemoveRange( 20, list.Count-20 );

This does it in place. This is still O(n) as the references to each object must be removed, but should be a little faster than any other method.

user_39912110

The list can be truncated using the RemoveRange keyword . The function is as follows:

  void List<type>.RemoveRange(int index, int count);

This removes the elements from index until count. Using this for type int, to remove from 0 to the not required points:

Code:

int maxlimit = 100;
List<int> list_1 = new List<int>();
if (list_1.Count > maxLimit){
    list_1.RemoveRange(0, (list_1.Count - maxlimit));
}
user_74246660
Related