我想将下面的Java代码移植到Dart,并且对此感到困惑。如何实现Iterable <E>
在Java中,Iterable接口是使用一种方法清理并实现此功能的地方。
此代码如何最好地转换为Dart?
/**
* Chess squares represented as a bitmap.
*/
public class ChessSquares implements Iterable<ChessSquare> {
private static class ChessSquaresIterator implements Iterator<ChessSquare> {
long bits;
int nextBit;
public ChessSquaresIterator(long bits) {
this.bits = bits;
nextBit = Long.numberOfTrailingZeros(bits);
}
@Override
public boolean hasNext() {
return (nextBit < 64);
}
@Override
public ChessSquare next() {
ChessSquare sq = ChessSquare.values()[nextBit];
bits = bits & ~sq.bit;
nextBit = Long.numberOfTrailingZeros(bits);
return sq;
}
@Override
public void remove() {
throw new UnsupportedOperationException();
}
}
@Override
public Iterator<ChessSquare> iterator() {
return new ChessSquaresIterator(bits);
}
...
如果您不想扩展基类,请混合Mixin类。 – 2013-04-20 11:32:12