Announcing LAMBDA: Turn Excel formulas into custom functions

I am gradually getting used to building solution with the focus upon λ-functions.  In the picture shown (from a question on the Chandoo forum) the challenge was to pick the competitors with the 3 highest scores.  Traditional formulas are quite possible but the the use of λ-functions provides clarity of intent; the detail is hidden from view.  

Here, I have used one function (UNPIVOTTED) to unpivot the table to a 2-column list, then the second (TOP) sorts the list by the second column and returns the top 3 records.

For completeness, UNPIVOTTED & TOP refer to

= LAMBDA(data,hdr,
      LET(
        m, ROWS(data),
        n, COLUMNS(data),
        k, SEQUENCE(m*n,1,0),
        r, 1+QUOTIENT(k,n),
        c, 1+MOD(k,n),
        u, INDEX(data,r,c),
        h, INDEX(hdr,c),
      CHOOSE({1,2},h,u) )
   )

= LAMBDA(n,list,idx,
      LET(
        sorted, SORT(list, idx,-1 ),
        r, SEQUENCE(n),
        c, SEQUENCE(1,COLUMNS(list)),
      INDEX(sorted, r, c) )
   )