Feature request - maximum/minimum and related functions with arbitrary orderings

[jlumpe]

I'm constantly missing the key argument to Python's max() and min() functions which can be used to specify a function that returns a sort key, just like the by argument to Julia's sort().

Given that finding the minimum/maximum is equivalent to finding the first/last element of a collection in sorted order, it only makes sense to allow alternate Base.Order.Orderings just as in Base.sort(). This would entail adding by, lt, and ord keyword arguments to max, maximum, findmax, argmax, and their counterparts.

I'm definitely prepared to write the implementation myself if this is a desired feature.

[kimikage]

Is what you're asking for different from this?

julia> maximum(abs, [-2, 1, 0])
2

[jakobnissen]

Dup of #28210 , I think

[jlumpe]

More or less a duplicate, but I'm proposing we also add the lt and ord arguments from Base.sort. I'd expect those to be used far less but it makes sense to make the API consistent with sort.