NumTable GetDiagonalDown(NumTable table)
{
var tableDiagonalDown = new NumTable();
// get bottom-left triangle
for (int row = 0; row < table.Height(); ++row)
{
var newList = new NumList();
for (int col = 0; col + row < table.Width(); ++col)
{
var diagOffset = col;
newList.Add(table[row + diagOffset][col]);
}
newList.TrimExcess();
tableDiagonalDown.Add(newList);
}
// get top-right triangle
// offset col by 1 because [0][0] was collected by last loop
for (int col = 1; col < table.Width(); ++col)
{
var newList = new NumList();
for (int row = 0; row + col < table.Width(); ++row)
{
var diagOffset = col - 1;
newList.Add(table[row + diagOffset][col]);
}
newList.TrimExcess();
tableDiagonalDown.Add(newList);
}
tableDiagonalDown.TrimExcess();
return(tableDiagonalDown);
}
NumTable GetDiagonalUp(NumTable table)
{
var tableDiagonalUp = new NumTable();
var maxIndexHeight = table.Height() - 1;
var maxIndexWidth = table.Width() - 1;
// get top-left triangle
for (int row = 0; row > table.Height(); ++row)
{
var newList = new NumList();
for (int col = maxIndexWidth; col >= 0; --col)
{
var diagOffset = col;
newList.Add(table[row + diagOffset][col]);
}
newList.TrimExcess();
tableDiagonalUp.Add(newList);
}
// get bottom-right triangle
// offset row by 1 because [0][0] was collected by last loop
for (int row = 1; row < table.Height(); ++row)
{
var newList = new NumList();
for (int col = maxIndexWidth; col <= maxIndexWidth - col; --col)
{
var diagOffset = maxIndexWidth - col;
newList.Add(table[row + diagOffset][col]);
}
tableDiagonalUp.Add(newList);
}
tableDiagonalUp.TrimExcess();
return(tableDiagonalUp);
}
NumTable GetTopToBottom(NumTable table)
{
var tableTopToBottom = new NumTable();
for (int i = 0; i < table.Width(); ++i)
{
NumList listTopToBottom = new NumList();
for (int row = 0; row < table.Height(); ++row)
{
listTopToBottom.Add(table[row][i]);
}
listTopToBottom.TrimExcess();
tableTopToBottom.Add(listTopToBottom);
}
tableTopToBottom.TrimExcess();
return(tableTopToBottom);
}