Sha256: 2e4fd4811b9e015bea6b1d2fcfecae34c56d6d248057525c168b699b2c3c9e17
Contents?: true
Size: 919 Bytes
Versions: 62
Compression:
Stored size: 919 Bytes
Contents
abstract class Error() of InvalidWindowSize | InvalidDigit {}
class InvalidWindowSize() extends Error() {
shared actual default Boolean equals(Object that) => that is InvalidWindowSize;
}
class InvalidDigit(Character c) extends Error() {
shared actual default Boolean equals(Object that) {
if (is InvalidDigit that) {
return that.c == c;
}
return false;
}
}
Integer|Error largestProduct(String digits, Integer window) {
if (window<0 || window>digits.size) {
return InvalidWindowSize();
}
value invalids = [for (d in digits) if (!('0'..'9').contains(d)) d];
if (nonempty invalids) {
return InvalidDigit(invalids[0]);
}
value parsed = [for (d in digits) d.integer - '0'.integer];
value ranges = { for (i in 0 .. (digits.size - window)) parsed[i:window] };
return max({ for (r in ranges) r.fold(1)((acc, e) => acc * e) });
}
Version data entries
62 entries across 62 versions & 1 rubygems