assert("0123456789".indexOfAscii('0') == 0); assert("0123456789".indexOfAscii('9') == 9); assert("0123456789".indexOfAscii('4') == 4); assert("The quick brown fox jumped over the lazy dog.".indexOfAscii('d') == 25); assert("The quick brown fox jumped over the lazy dog.".indexOfAscii('z') == 38);