thojanssens1
Sort by multiple values?
Is there an easy way to sort a list of maps by some key, but if those keys are equal, be able to specify another key (and again if equal, another key, and so on)?
E.g.
fruits =
[
%{
color: "yellow",
name: "potato"
},
%{
color: "red",
name: "raspberry"
},
%{
color: "red",
name: "radish"
},
%{
color: "yellow",
name: "pineapple"
},
]
First sort the maps by color ascending, but if equal, by name ascending.
Marked As Solved
hauleth
I cannot find docs to back it up, but I believe that you want Enum.sort_by(list, &{&1.color, &1.name}).
Also Liked
LostKobrakai
Tuples are ordered by size, two tuples with the same size are compared element by element.
sodapopcan
You negate the terms:
Enum.sort_by(list, &{!&1.color, !&1.name})
lud
No, this will sort that list: [{false, false},{false, false},{false, false},{false, false}].
You can just reverse the list. If you want to sort by ascending name but descending color you will have to compute a score or something like that, like mapping colors to integers and multiply them by -1 to get descending order.
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