Merge pull request ryanmcdermott#234 from valtism/master

Change complex reduce code sample to clearer map reduce.

Author: ryanmcdermott

README.md

@@ -659,7 +659,7 @@ class SuperArray extends Array {
 
 ### Favor functional programming over imperative programming
 JavaScript isn't a functional language in the way that Haskell is, but it has
-a functional flavor to it. Functional languages are cleaner and easier to test.
+a functional flavor to it. Functional languages can be cleaner and easier to test.
 Favor this style of programming when you can.
 
 **Bad:**
@@ -705,10 +705,9 @@ const programmerOutput = [
   }
 ];
 
-const INITIAL_VALUE = 0;
-
 const totalOutput = programmerOutput
-  .reduce((acc, { linesOfCode }) => acc + linesOfCode, INITIAL_VALUE);
+  .map(output => output.linesOfCode)
+  .reduce((totalLines, lines) => totalLines + lines);
 ```
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