c# - check if array position is null or a space?

Question

I need to check if the final place of an array is equal to a space " ". My code below throws an out of range exception and the words variable includes a space at the end through a regex pattern.

Code:

string[] words = pattern.Split(input);
int limit = words.Count();

if(words[limit] == " ")
{ limit = limit - 1;  }

Answer 1

    string[] words = pattern.Split(input);
    int limit = words.Count();

    if(words[limit-1] == " ")
    { limit = limit - 1;  }

The array position needs to be -1 when a count() is used. Thanks.

Answer 2

.Count()返回数组中元素的数量，但第一个元素索引为0，因此最后一个索引应为words.Count()-1

Answer 3

You can also use the following code. The IsNullOrWhiteSpace method checks if a given string only consists null or white space characters.

    string[] words = pattern.Split(input);
    int limit = words.Length;

    if(String.IsNullOrWhiteSpace(words[limit-1]))
    {
      limit-=1; //edit value of limit based on your own logic
    }