private Peers GetRowPeersForValueCell(Int32 column, Int32 row)
{
var peers = new Peers();
/* Backtrack until a SumCell is hit. */
var startColumn = column;
while (!(this._cells[--startColumn, row] is SumCell))
{
;
}
peers.Sum = (this._cells[startColumn, row] as SumCell).Right;
/* Go forward until another SumCell or the edge of the puzzle's row is hit. */
while ((++startColumn < this._width) && !(this._cells[startColumn, row] is SumCell))
{
peers.Add(this._cells[startColumn, row] as ValueCell);
}
return(peers);
}
private Peers GetColumnPeersForValueCell(Int32 column, Int32 row)
{
var peers = new Peers();
/* Backtrack until a SumCell is hit. */
var startRow = row;
while (!(this._cells[column, --startRow] is SumCell))
{
;
}
peers.Sum = (this._cells[column, startRow] as SumCell).Down;
/* Go forward until another SumCell or the edge of the puzzle's column is hit. */
while ((++startRow < this._height) && !(this._cells[column, startRow] is SumCell))
{
peers.Add(this._cells[column, startRow] as ValueCell);
}
return(peers);
}