From a9b0996e7839070e446aee35a049452a7dde1a46 Mon Sep 17 00:00:00 2001
From: Michael Fogleman <michaelwfogleman@gmail.com>
Date: Mon, 11 Sep 2017 10:19:02 -0400
Subject: [PATCH] Document set-elem.

---
 List-of-Navigators.md | 17 +++++++++++++++++
 1 file changed, 17 insertions(+)

diff --git a/List-of-Navigators.md b/List-of-Navigators.md
index a4358ff..5471812 100644
--- a/List-of-Navigators.md
+++ b/List-of-Navigators.md
@@ -42,6 +42,7 @@
     - [putval](#putval)
     - [not-selected?](#not-selected)
     - [selected?](#selected)
+    - [set-elem](#set-elem)
     - [srange](#srange)
     - [srange-dynamic](#srange-dynamic)
     - [stay-then-continue](#stay-then-continue)
@@ -649,6 +650,22 @@ See also [not-selected?](#not-selected?).
 nil
 ```
 
+## set-elem
+
+`(set-elem element)`
+
+Navigates to the given element in the set only if it exists in the set.
+Can transform to NONE to remove the element from the set.
+
+```clojure
+=> (select [(set-elem 3)] #{3 4 5})
+[3]
+=> (select [(set-elem 3)] #{4 5})
+[]
+=> (setval [(set-elem 3)] NONE #{3 4 5})
+#{4 5}
+```
+
 ## srange
 
 `(srange start end)`