Thanks. What a newbie question.
在 2019年5月6日星期一 UTC+8上午11:34:36，se...@corfield.org写道：
>
> (sort-by #{:age} …) will use the set #{:age} as the keyfn, and both
> (#{:age} {:age 3, :name “luo”}) and (#{:age} {:age 1, :name “sheng”}) both
> return :age – because both maps contain the key in the set. As far as
> sort-by is concerned, both hash maps compare equal.
>
>
>
> What you want is (sort-by :age …) so you the keyfn pulls the value
> corresponding to :age out of the hash maps. That will produce 3 from {:age
> 3, :name “luo”} and 1 from {:age 1, :name “sheng”} so they will sort
> appropriately.
>
>
>
> Sean Corfield -- (970) FOR-SEAN -- (904) 302-SEAN
> An Architect's View -- http://corfield.org/
>
> "If you're not annoying somebody, you're not really alive."
> -- Margaret Atwood
>
>
>
> *From: *sheng....@gmail.com <javascript:>
> *Sent: *Sunday, May 5, 2019 7:48 PM
> *To: *Clojure <javascript:>
> *Subject: *results from sort-by are not sorted
>
>
>
> 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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