DRY

README.md

@@ -140,7 +140,11 @@ Table of Contents:
 
 ***
 ##### Honor DRY
-> This convention is specifically put in this list (instead of treat it as a [great idea](#great-ideas)) so that reviewers can reject PRs that include the same code several times or PRs that re-implement something that they know it's already done somewhere else.
+> Don't write the same code in many places, use functions and variables for that
+
+*Examples*: [dry](src/dry.erl)
+
+*Reasoning*: This convention is specifically put in this list (instead of treat it as a [great idea](#great-ideas)) so that reviewers can reject PRs that include the same code several times or PRs that re-implement something that they know it's already done somewhere else.
 
 ***
 ##### Avoid dynamic calls

src/dry.erl

@@ -0,0 +1,21 @@
+%% @doc this is a very very trivial example, DRY has a much wider scope but it's
+%% provided just as an example
+-module(dry).
+
+-export([bad/0, good/0]).
+
+bad() ->
+ case somthing:from(other, place) of
+ {show, _} ->
+ display:nicely(somthing:from(other, place));
+ nothing ->
+ display:nothing()
+ end.
+
+good() ->
+ case somthing:from(other, place) of
+ {show, _} = ThingToShow ->
+ display:nicely(ThingToShow);
+ dont_show_me ->
+ display:nothing()
+ end.