From 02f5ec75874a837e8543966208fe58c5471da8de Mon Sep 17 00:00:00 2001
From: Juan Facorro <juan.facorro@gmail.com>
Date: Tue, 12 Aug 2014 14:21:28 -0300
Subject: [PATCH] [#1] get/[2,3] to access values in nested maps.

---
 .gitignore          |  1 +
 Makefile            |  8 ++++++++
 src/katana_maps.erl | 28 ++++++++++++++++++++++++++++
 3 files changed, 37 insertions(+)
 create mode 100644 src/katana_maps.erl

diff --git a/.gitignore b/.gitignore
index 9c070b2..2d6bc77 100644
--- a/.gitignore
+++ b/.gitignore
@@ -9,3 +9,4 @@ logs
 bin
 ebin
 deps
+.erlang.mk.*
\ No newline at end of file
diff --git a/Makefile b/Makefile
index 4921c48..6ad2b14 100644
--- a/Makefile
+++ b/Makefile
@@ -1,2 +1,10 @@
 PROJECT = katana
+
+DEPS = sync
+
+dep_sync = git https://github.com/rustyio/sync.git master
+
 include erlang.mk
+
+shell: app
+	erl -pa ebin -pa deps/*/ebin -s sync
diff --git a/src/katana_maps.erl b/src/katana_maps.erl
new file mode 100644
index 0000000..4d28083
--- /dev/null
+++ b/src/katana_maps.erl
@@ -0,0 +1,28 @@
+-module(katana_maps).
+
+-export([
+         get/2,
+         get/3
+        ]).
+
+-spec get(term(), map()) -> term().
+get(Keys, Map) ->
+    get(Keys, Map, undefined).
+
+-spec get(term(), map(), term()) -> term().
+get([Key], Map, Default) ->
+    get(Key, Map, Default);
+get([Key | Rest], Map, Default) ->
+    case get(Key, Map, Default) of
+        NewMap when is_map(NewMap) ->
+            get(Rest, NewMap, Default);
+        _ ->
+            Default
+    end;
+get(Key, Map, Default) ->
+    case maps:is_key(Key, Map) of
+        true ->
+            maps:get(Key, Map);
+        false ->
+            Default
+    end.