Custom sort?

[Didier Lachieze]

The CAS sort function works differently than the HOME SORT function for the second argument, it should define a function to be used for the sorting.

In CAS :
sort({{1,2},{2,2.5},{3,1.5}},(x,y)->when(x[2] = y[2],x[1]>y[1],x[2]>y[2]))
returns:
{{2,2.5},{1,2},{3,1.5}}

The sorting is done on the second item in descending order, and if the second item is the same, on the first item also in descending order.