Add a column with a column name where last data is available.

[#1]

How can I add failure column with a column name from where test data start missing?

[#2 · Accepted solution]

Here is the formula I cam up with

As Constant(
	firstCol = 3;
	nTests = 5;
	lastCol = (firstCol + nTests) - 1;
	dt = Current Data Table();
);
nPass = Length( Loc( dt[Row(), Index( firstCol, lastCol )] ) );
If( nPass == 5,
	x = "Pass",
	x = Column( (firstCol + nPass) - 1 ) << get name
);
x;

[#3 · Accepted solution]

Other option

Names Default To Here(1);

dt = Data Table("Untitled");

dt << New Column("Col", Character, Nominal);

test_cols = Filter Each({colname}, dt << Get Column Names("Continuous", "String"), Starts With(colname, "Test "));

For Each Row(dt,
	idx = Max(Loc(dt[Row(), test_cols]));
	If(idx >= N Items(test_cols),
		:Col = "Pass"
	,
		:Col = test_cols[idx];
	);
);