Dynamically extract a list of unique values from a column range in Excel?

Question

I found this example in an excel tutorial

The following image is my desired result. and the following formula is supposed to be able to extract the unique records dynamically. I know how to do this with VBA but i really want to make this a formula without using a macro.

=IFERROR(INDEX($B$2:$B$9, MATCH(0,COUNTIF($D$1:D1, $B$2:$B$9), 0)),"")

I have tried the above formula as given in the example link above but it returns with error. I am assuming that this worked at some point in excel however it no longer works with Excel 2016. Can someone clarify why this formula no longer works? Thank you.

Answer 1

Answering my own question about 5 minutes later, so i read the patch nodes on the how match changed from excel 2008 to 2016. You need to use the index rather than the count.

=IFERROR(INDEX($B$2:$B$9, MATCH(0,INDEX(COUNTIF($D$1:D1,$B$2:$B$9),0,0),0)),"0)),"")")

Recommended edit to the formula to change the value returned on error to a blank: =IFERROR(INDEX($B$2:$B$9, MATCH(0,INDEX(COUNTIF($D$1:D1,$B$2:$B$9),0,0),0)),"")