what is the fastest way to check whether string has uppercase letter in c#?

Question

My first implementation idea is to do simply:

bool hasUpperCase (string str) {     if(string.IsNullOrEmpty(str))          return false;     for (int i = 0; i < str.Length; i++) {         if (char.IsUpper (str[i]))             return true;                         }     return false; } 

but maybe there is another faster way to do that ?

Answer 1

You could reduce that to

bool HasUpperCase (string str) {     return !string.IsNullOrEmpty(str) && str.Any(c => char.IsUpper(c)); } 

using LINQ.