Add List Functions For A Namespace as a clojure til

Author: jbranchaud

README.md

@@ -7,7 +7,7 @@ variety of languages and technologies. These are things that don't really
 warrant a full blog post. These are mostly things I learn by pairing with
 smart people at [Hashrocket](http://hashrocket.com/).
 
-_419 TILs and counting..._
+_420 TILs and counting..._
 
 ---
 
@@ -48,6 +48,7 @@ _419 TILs and counting..._
 - [Evaluate One Liners With lein-exec](clojure/evaluate-one-liners-with-lein-exec.md)
 - [Expanding Macros](clojure/expanding-macros.md)
 - [Get The Value Of An Environment Variable](clojure/get-the-value-of-an-environment-variable.md)
+- [List Functions For A Namespace](clojure/list-functions-for-a-namespace.md)
 - [Load A File Into The REPL](clojure/load-a-file-into-the-repl.md)
 - [Mapping With An Index](clojure/mapping-with-an-index.md)
 - [Open JavaDocs](clojure/open-javadocs.md)

clojure/list-functions-for-a-namespace.md

@@ -0,0 +1,42 @@
+# List Functions For A Namespace
+
+You know that `clojure.string` has a function for uppercasing a string, but
+you can't quite remember the name of the function. You'd remember if you saw
+the name though. What you'd like to do is list all the functions in the
+`clojure.string` namespace to see if you can pick it out.
+
+You can do just that. There are a couple ways to do it, in fact.
+
+You can use the `dir` function with Clojure 1.6+. Alternatively, you can
+grab all the keys from the public intern mappings of the namespace.
+
+```clojure
+> (dir clojure.string)
+blank?
+capitalize
+ends-with?
+escape
+includes?
+index-of
+join
+last-index-of
+lower-case
+re-quote-replacement
+replace
+replace-first
+reverse
+split
+split-lines
+starts-with?
+trim
+trim-newline
+triml
+trimr
+upper-case
+nil
+
+> (keys (ns-publics 'clojure.string))
+(ends-with? capitalize reverse join replace-first starts-with? escape last-index-of re-quote-replacement includes? replace split-lines lower-case trim-newline upper-case split trimr index-of trim triml blank?)
+```
+
+[source](http://stackoverflow.com/questions/2747294/how-to-list-the-functions-of-a-namespace)