replaceCharAtIndex static method

String replaceCharAtIndex(
  1. String original,
  2. int index,
  3. String replacement
)

Implementation

static String replaceCharAtIndex(String original, int index, String replacement) {
  if (index < 0 || index >= original.length) {
    return original;
  }

  return original.replaceRange(index, index + 1, replacement);
}