array of ints to string?

Unity Engine
1

In C#, is there a more straightforward way of concatenating an array of ints to a string than iterating through the array and adding each int to the string one at at time? Like string.join() (but that takes an array of strings).

2 
string IntsToString(int[] intArray,  char delimter = ' ')
{
     StringBuilder builder = new StringBuilder("");
     foreach(int oneInt in intArray)
     {
            builder.Append(oneInt.ToString());
            builder.Append(delimter);
     }
     // remove the last delimeter;
     builder.Remove(sb.Length-1,1);
     return builder.ToString();
}
3

Without delimiter between the values:

int[] integers = {3, 5, 6, 2, 3};
string word = integers.Select(i => i.ToString()).Aggregate((i, j) => i + j);

With delimiter:

int[] integers = {3, 5, 6, 2, 3};
string delimiter = ", ";
string word = integers.Select(i => i.ToString()).Aggregate((i, j) => i + delimiter + j);

Alternative with string.join:

int[] integers = {3, 5, 6, 2, 3};
string word = string.Join(", ", integers.Select(i => i.ToString()).ToArray());
4

I like the join better than Aggregate since your only creating accumlater string. With Aggregate you recopying the string into a new accumulator each time since strings are immutable.

5

Thank you, takatok, I was unaware of StringBuilder or the performance hit that can come from modifying a String repeatedly.

6

Thank you, Piflik. With the string.join version I’m getting “error CS1061: Type int[ ]' does not contain a definition for Select’ and no extension method Select' of type int[ ]’ could be found”. Am I missing something?

7

It’s in Ling namespace, add System.Linq to your using statements.

8

Thank you!