修剪列表最后一个元素的结尾

Question

I am trimming a chracter from the end of the last element of a List and even though it works I feel it is not the best way of doing this.

for (int i = lstTopicsDisplay.Count - 1; i >= 0; i--)
{
    if (i == lstTopicsDisplay.Count-1)
    {
        string lastValue = lstTopicsDisplay[i].TrimEnd(';');
        lstTopicsDisplay[i] = lastValue;
    }
}

Is there a better way, such as using a Lambda expression to get the same result?

Answer 1

 int lastPos = lstTopicsDisplay.Count - 1;
 lstTopicsDisplay[lastPos] = lstTopicsDisplay[lastPos].TrimEnd(';')

Answer 2

lstTopicsDisplay.Last().TrimEnd(';')

Answer 3

As you are just changing one item in the list, you don't need the loop.

Just calculating the index for the item that you want to change, and using the rest of the code unchanged:

int i = lstTopicsDisplay.Count - 1;

string lastValue = lstTopicsDisplay[i].TrimEnd(';');
lstTopicsDisplay[i] = lastValue;

Or simply:

lstTopicsDisplay[lstTopicsDisplay.Count - 1] = lstTopicsDisplay[lstTopicsDisplay.Count - 1].TrimEnd(';');

Answer 4

尝试这个：

string lastValue = lstTopicsDisplay.[lstTopicsDisplay.Count - 1].TrimEnd(';');