From 1f1e59bf55cbc31acb1b5bebfc45c78b53dc3372 Mon Sep 17 00:00:00 2001
From: ajant <ajant.github@gmail.com>
Date: Wed, 22 Feb 2017 11:41:41 +0100
Subject: [PATCH 1/2] License info fixed

---
 LICENSE.md | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/LICENSE.md b/LICENSE.md
index 766a0a5..dfda3fd 100644
--- a/LICENSE.md
+++ b/LICENSE.md
@@ -1,6 +1,6 @@
 The MIT License (MIT)
 
-Copyright (c) {{{year}}} {{{fullname}}}
+Copyright (c) 2015-2017 Aleksandar Jovanovic <ajant.github@gmail.com>
 
 Permission is hereby granted, free of charge, to any person obtaining a copy
 of this software and associated documentation files (the "Software"), to deal

From 9de12963891eeaf45a064c3007d320c237579233 Mon Sep 17 00:00:00 2001
From: Petar Zivkovic <me@petarzivkovic.com>
Date: Tue, 2 Jan 2018 17:01:03 +0100
Subject: [PATCH 2/2] Add transpose method

---
 README.md                                 |  8 +++++
 src/Categories/Changers.php               | 13 +++++++
 test/SimpleArrayLibrary/TransposeTest.php | 41 +++++++++++++++++++++++
 3 files changed, 62 insertions(+)
 create mode 100644 test/SimpleArrayLibrary/TransposeTest.php

diff --git a/README.md b/README.md
index f25d890..7cd7ffb 100755
--- a/README.md
+++ b/README.md
@@ -287,4 +287,12 @@ exists
 SimpleArrayLibrary::setColumn(array(array('foo' => 2), array()), 'foo', 1); // array(array('foo' => 1), array('foo' => 1))
 SimpleArrayLibrary::setColumn(array(array('foo' => 2), array()), 'foo', 1, false, false); // array(array('foo' => 2), array())
 SimpleArrayLibrary::setColumn(array(array('foo' => 2), array()), 'foo', 1, true, false); // array(array('foo' => 2), array('foo' => 1))
+```
+transpose
+------------------------------
+Transpose a matrix
+
+Turns rows into columns, and columns into rows. This is very handy when you need to reshape a dataset for a report or plot.
+```php
+SimpleArrayLibrary::transpose(array(array(1, 2, 3). array(4, 5, 6))); // array(array(1, 4), array(2, 5), array(3, 6))
 ```
\ No newline at end of file
diff --git a/src/Categories/Changers.php b/src/Categories/Changers.php
index 998636c..de62f78 100644
--- a/src/Categories/Changers.php
+++ b/src/Categories/Changers.php
@@ -181,4 +181,17 @@ public static function setColumn(array $matrix, $column, $value, $insertIfMissin
 
         return $matrix;
     }
+
+    /**
+     * @param array $matrix
+     *
+     * @return array
+     */
+    public static function transpose(array $matrix)
+    {
+        // example #4 explains how this works
+        // http://php.net/manual/en/function.array-map.php
+        array_unshift($matrix, null);
+        return call_user_func_array('array_map', $matrix);
+    }
 }
\ No newline at end of file
diff --git a/test/SimpleArrayLibrary/TransposeTest.php b/test/SimpleArrayLibrary/TransposeTest.php
new file mode 100644
index 0000000..0290c62
--- /dev/null
+++ b/test/SimpleArrayLibrary/TransposeTest.php
@@ -0,0 +1,41 @@
+<?php
+
+use SimpleArrayLibrary\SimpleArrayLibrary;
+
+class TransposeTest extends PHPUnit_Framework_TestCase
+{
+    /**
+     * @param array $data
+     *
+     * @return void
+     * @dataProvider getData
+     */
+    public function test_function(array $data)
+    {
+        // invoke logic & test
+        $this->assertEquals($data['expResult'], SimpleArrayLibrary::transpose($data['matrix']));
+    }
+
+    /**
+     * @return array
+     */
+    public function getData()
+    {
+        return array(
+            // #0 column required & present
+            array(
+                array(
+                    'matrix' => array(
+                        array(1, 2, 3),
+                        array(4, 5, 6)
+                    ),
+                    'expResult' => array(
+                        array(1, 4),
+                        array(2, 5),
+                        array(3, 6)
+                    )
+                )
+            )
+        );
+    }
+}
\ No newline at end of file