Math.max() conversions post by Gonçalo Morais

Close #73.

Signed-off-by: DTrejo <david.trejo@dena.jp>

README.md

@@ -91,3 +91,4 @@ Ordered by date of first contribution.
 - [Thaddee Tyl aka `espadrine`](https://github.com/espadrine)
 - [Stanley Stuart aka `fivetanley`](https://github.com/fivetanley)
 - [Ben Combee aka `unwiredben`](https://github.com/unwiredben)
+- [Gonçalo Morais aka `gnclmorais`](https://github.com/gnclmorais)

posts/2013-08-07-Math.max()-behaviour.md

@@ -0,0 +1,34 @@
+`Math.max()` has an interesting behaviour, handling different **JavaScript data
+types** in different ways.
+
+<code>
+    Math.max(3, 0);           // 3
+    Math.max(3, {});          // NaN
+    Math.max(3, []);          // 3
+    Math.max(3, true);        // 3
+    Math.max(3, 'foo');       // NaN
+    Math.max(-1, null);       // 0
+    Math.max(-1, undefined);  // NaN
+</code>
+
+Now, let's focus on **Booleans**:
+
+<code>
+    Math.max(1, true);     // 1
+    Math.max(0, true);     // 1
+    Math.max(1, false);    // 1
+    Math.max(-1, true);    // 1
+    Math.max(-1, false);   // 0
+</code>
+
+And now, on **Arrays**:
+
+<code>
+    Math.max(-1, []);      // 0
+    Math.max(-1, [1]);     // 1
+    Math.max(-1, [1, 4]);  // NaN
+</code>
+
+So next time, watch out for what you pass into `Math.max()`.
+
+— [@gnclmorais](http://gnclmorais.com/gnclmorais)