Proposal idea: descending sort

[MaxGraey]

How about arr.sortRight(PlainDate.compare) which will be match with reduceRight?

Btw I proposed built-in compare class method for rest primitives:

Builtin Ord / Compare method for primitives

Many languages contain special method for ordering which very useful for sorting or data structures with predicates like heap, priority queue, LRU cache and etc. Problem Sometimes implement ord or cmp / compare properly in user space is quite hard. Best example is numbers. Proper ordering (baseline): Float64Array.of(-1, -0, NaN, 1, -Infinity, +0, Infinity).sort() // > [-Infinity, -1, -0, 0, 1, Infinity, NaN] But implement same ordering with ordinal Array's sort is quite difficult: [-1, -0, …