capitalizeFirst method Null safety

String? capitalizeFirst(
  1. String s
)

Uppercase first letter inside string and let the others lowercase Example: your name => Your name

Implementation

static String? capitalizeFirst(String s) {
  if (isNull(s)) return null;
  if (isBlank(s)!) return s;
  return s[0].toUpperCase() + s.substring(1).toLowerCase();
}