Document map-keys.

2017-09-11 09:40:29 -04:00 · 2017-09-11 09:40:29 -04:00 · c90358fb92
commit c90358fb92
parent a9ba39f748
1 changed files with 10 additions and 0 deletions
--- a/List-of-Navigators.md
+++ b/List-of-Navigators.md
@ -10,6 +10,7 @@
    - [END](#end)
    - [FIRST](#first)
    - [LAST](#last)
+    - [MAP-KEYS](#map-keys)
    - [MAP-VALS](#map-vals)
    - [META](#meta)
    - [NIL->LIST](#nil-list)
@ -168,6 +169,15 @@ nil
 nil
 ```

+## MAP-KEYS
+
+`MAP-KEYS` navigates to every key in a map. `MAP-VALS` is more efficient than `[ALL FIRST]`.
+
+```clojure
+=> (select [MAP-KEYS] {:a 3 :b 4})
+[:a :b]
+```
+
 ## MAP-VALS

 `MAP-VALS` navigates to every value in a map. `MAP-VALS` is more efficient than `[ALL LAST]`.