Yup, juxt is definitely useful, but you need to understand what it is really
doing.
In your case you have three “functions” and you’re invoking them each with two
arguments. Let’s look at those:
(:who {:who 1 :when 2} missing) ;; where missing is {:who 4 :what 99} => 1
(:what {:who 1 :when 2} missing) ;; where missing is {:who 4 :what 99} =>
missing, i.e., {:who 4 :what 99}
(:when {:who 1 :when 2} missing) ;; where missing is {:who 4 :what 99} => 2
Does that help?
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: [email protected]<mailto:[email protected]>
Sent: Saturday, July 15, 2017 8:52 PM
To: Clojure<mailto:[email protected]>
Subject: What is juxt really doing?
If I do this:
((juxt :who :what :when) {:who 1 :when 2} {:who 4 :what 99})
I get:
[1 {:who 4, :what 99} 2]
Why does a map come back instead of a number?
Does anyone use juxt in the real world, or is mostly for examples?
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