More efficient way to get all indexes of a character in a string

Question

Instead of looping through each character to see if it\'s the one you want then adding the index your on to a list like so:

     var foundIndexes = new List&         


        

Answer 1

The raw iteration is always better & most optimized.

Unless it's a bit complex task, you never really need to seek for a better optimized solution...

So I would suggest to continue with :

var foundIndexes = new List();

for (int i = 0; i < myStr.Length; i++)

     if (myStr[i] == 'a') foundIndexes.Add(i);