lib.sortOn

Sort a list based on the default comparison of a derived property b.

The items are returned in b-increasing order.

Performance:

The passed function f is only evaluated once per item, unlike an unprepared sort using f p < f q.

Laws:

sortOn f == sort (p: q: f p < f q)

Inputs

f

1. Function argument

list

2. Function argument

Type

sortOn :: (a -> b) -> [a] -> [a], for comparable b

Examples

sortOn stringLength [ "aa" "b" "cccc" ]
=> [ "b" "aa" "cccc" ]

Noogle also knows

Aliases

• lib.lists.sortOn