find method
Find a chess by a type code
Implementation
ChessPos? find(String matchCode) {
ChessPos? pos;
int rowNumber = 0;
_rows.any((row) {
int start = row.indexOf(matchCode);
if (start > -1) {
pos = ChessPos(start, rowNumber);
return true;
}
rowNumber++;
return false;
});
return pos;
}