editing

README.md

@@ -2,6 +2,29 @@
 
 [![Clojars Project](https://img.shields.io/clojars/v/techascent/tech.jna.svg)](https://clojars.org/techascent/tech.jna)
 
+For a bit of explanation, checkout our [blog](http://techascent.com/blog/jna-simplifies-your-life.html).
+
+
+## Usage
+
+```clojure
+(require '[tech.jna :as jna])
+(jna/def-jna-fn "c" memset
+        "Set byte memory to a value"
+        com.sun.jna.Pointer ;;void* return value
+        [data identity]     ;;Each argument has a coercer-fn. Pointers can be lots of types.
+        [value int]         ;;read docs for memset
+        [n-bytes jna/size-t])
+
+user> (def test-ary (float-array [1 2 3 4]))
+#'user/test-ary
+user> (vec test-ary)
+[1.0 2.0 3.0 4.0]
+user> (memset test-ary 0 (* 4 Float/BYTES))
+user> (vec test-ary)
+[0.0 0.0 0.0 0.0]
+```
+
 Copyright © 2018 TechAscent, LLC
 
 Distributed under the Eclipse Public License either version 1.0 or (at