Function overloading is a process of creating several functions with the same name, but different parameters.

In overloaded variants of a function, the number of arguments or their type must be different. A specific function variant is selected based on the correspondence of the list of arguments when calling the function, to the list of parameters in the function declaration.

void OnStart() {
  string a[] = {"one", "1st", "two", "2nd"};
  string b[][2] = {{"one", "1st"}, {"two", "2nd"}};
 
  Print(array_string_search(a, "two"));  // 2
  Print(array_string_search(b, "two"));  // 1
 
}
 
//+------------------------------------------------------------------+
//| Search for a value in an array of strings.                       |
//| @param &arr: array of strings                                    |
//| @param str: the value to look for                                |
//| @return idx: the position of the value in the array              |
//+------------------------------------------------------------------+
int array_string_search(string &arr[], string str) {
  int idx = -1;
 
  for (int i = 0; i < ArraySize(arr); i++) {
    if (str == arr[i]) {
      idx = i;
      break;
    }
  }
 
  return(idx);
}
int array_string_search(string &arr[][2], string str) {
  int idx = -1;
 
  for (int i = 0; i < ArrayRange(arr, 0); i++) {
    if (str == arr[i][0]) {
      idx = i;
      break;
    }
  }
 
  return(idx);
}