Questions tagged [update-in]
5 questions
5
votes
2 answers
In Clojure, How do I update a nested map correctly?
I've just started learning Clojure, after many years of Java (and PHP/JavaScript) experience. What a challenge :-)
How do I update a map of values idiomatically? When I use the map function on a map it doesn't return a map, it returns a…
Steve Moseley
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3
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1 answer
Update values in a vector of maps in clojure
I have a vector of maps with same keys:
(def items [{:id 1 :name "first item"}
{:id 2 :name "second item"}])
I can uppercase the value of the :name key in the first map in the vector:
(update-in items [0 :name]…
koszti
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1
vote
1 answer
Is (def m (update-in m ks f & args)) a good practice?
I'm new to the world of clojure and I have a doubt.
I have a nested map such as
(def accounts (hash-map :XYZ (hash-map :balance (hash-map 171000 0 :171018 500 :171025 200)
:statement (hash-map :171018 [{:desc…
Darakt
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1
vote
3 answers
update two value at the same time in clojure
I am wondering how to update two values at the same time. For instance, I want to increase month and decrease age at the same time. My code is
user=>(def users {:month 1 :age 26})
user=>(update-in users [:month :age] inc dec)
I know this syntax is…
Xiufen Xu
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0
votes
1 answer
Clojure alter update-in returns nil and dosync doesnt allow recur
EDIT:
dosync creates itself a function so calls to recur get interpreted as calls made to the function dosync generated.
This is the footprint of the function I actually made. Kept it as simple as possible, I think.
(defn change-to-ref [ref data]
…
user5211470
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