Skip to content

Add assoc-in-some function #80

New issue

Have a question about this project? Sign up for a free GitHub account to open an issue and contact its maintainers and the community.

Sign up for GitHub

By clicking “Sign up for GitHub”, you agree to our terms of service and privacy statement. We’ll occasionally send you account related emails.

Already on GitHub? Sign in to your account

Open
erikcc02 wants to merge 1 commit into
base: master
Choose a base branch
from
Open

Add assoc-in-some function #80

Show file tree
Hide file tree
Changes from all commits
Commits
Show all changes
1 commit
Select commit
File filter

Filter by extension

Filter by extension
Conversations
Failed to load comments.
Loading
Jump to
Jump to file
Failed to load files.
Loading
Diff view
Diff view
5 changes: 5 additions & 0 deletions src/medley/core.cljc
View file
Open in desktop
Original file line number Diff line number Diff line change
Expand Up @@ -53,6 +53,11 @@
m
(persistent! acc))))))

(defn assoc-in-some
"Associates a value v in a nested associative structure provided that v is not nil."
[m k v]
(cond-> m (some? v) (assoc-in k v)))

(defn update-existing
"Updates a value in a map given a key and a function, if and only if the key
exists in the map. See: `clojure.core/update`."
Expand Down
8 changes: 8 additions & 0 deletions test/medley/core_test.cljc
View file
Open in desktop
Original file line number Diff line number Diff line change
Expand Up @@ -33,6 +33,14 @@
(is (nil? (m/assoc-some nil :a nil)))
(is (nil? (m/assoc-some nil :a nil :b nil))))

(deftest test-assoc-in-some
(is (= (m/assoc-in-some {:a 1 :b {:c 2}} [:b] 3) {:a 1 :b 3}))
(is (= (m/assoc-in-some [{:a 1} {:a 2}] [1 :a] 3) [{:a 1} {:a 3}]))
(is (= (m/assoc-in-some [{:a 1} {:a 2}] [1 :a] false) [{:a 1} {:a false}]))
(is (= (m/assoc-in-some [{:a 1} {:a 2}] [1 :a] nil) [{:a 1} {:a 2}]))
(is (nil? (m/assoc-in-some nil :a nil)))
(is (nil? (m/assoc-in-some nil [:a :b] nil))))

(deftest test-update-existing
(is (= (m/update-existing {:a 1} :a inc) {:a 2}))
(is (= (m/update-existing {:a 1 :b 2} :a inc) {:a 2 :b 2}))
Expand Down