clojure.core/sort-by
([keyfn coll] [keyfn comp coll])
Returns a sorted sequence of the items in coll, where the sort
order is determined by comparing (keyfn item). If no comparator is
supplied, uses compare. comparator must implement
java.util.Comparator. Guaranteed to be stable: equal elements will
not be reordered. If coll is a Java array, it will be modified. To
avoid this, sort a copy of the array.
nil
<sheng.peisi....@gmail.com> 于2019年5月6日周一 上午10:48写道：
> Hey there,
>
> in my lein repl,
>
> (sort-by #{:age} [{:age 3,:name "luo"},{:age 1,:name "sheng"}])
>
> returns
>
> ({:age 3, :name "luo"} {:age 1, :name "sheng"})
>
> rather than
>
> ({:age 1, :name "sheng"}, {:age 3, :name "luo"}).
>
> Why?
>
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