Update values in a vector of maps in clojure

Question

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] clojure.string/upper-case)
=> [{:id 1, :name "FIRST ITEM"} {:id 2, :name "second item"}]

How can I uppercase every :name key in every map? I expect this:

[{:id 1, :name "FIRST ITEM"} {:id 2, :name "SECOND ITEM"}]

Answer 1

This should do it:

(map #(update-in % [:name] clojure.string/upper-case) items)

The % sign stands in for each map in items in the function expression.