From 1e7da8084a5b496f29c191408117a97e39787ff8 Mon Sep 17 00:00:00 2001
From: =?UTF-8?q?Michael=20Lundb=C3=B8l?= <ml@napp.dk>
Date: Sat, 6 Jan 2018 01:59:24 +0100
Subject: [PATCH 1/2] Regression if the first value is not countable e.g. not
 if type array then count throws exception/warning on php7.2. So just return
 an empty collection.

---
 src/macros/transpose.php |  8 +++++++-
 tests/TransposeTest.php  | 12 ++++++++++++
 2 files changed, 19 insertions(+), 1 deletion(-)

diff --git a/src/macros/transpose.php b/src/macros/transpose.php
index d9121a4..e0e2856 100644
--- a/src/macros/transpose.php
+++ b/src/macros/transpose.php
@@ -14,7 +14,13 @@
         return new static();
     }
 
-    $expectedLength = count($this->first());
+    $firstItem = $this->first();
+
+    if (! $firstItem instanceof Countable) {
+        return new static();
+    }
+
+    $expectedLength = count($firstItem);
 
     array_walk($this->items, function ($row) use ($expectedLength) {
         if (count($row) !== $expectedLength) {
diff --git a/tests/TransposeTest.php b/tests/TransposeTest.php
index a6a8bec..9e743bf 100644
--- a/tests/TransposeTest.php
+++ b/tests/TransposeTest.php
@@ -149,4 +149,16 @@ public function it_can_transpose_a_single_row_array()
 
         $this->assertEquals($expected, $collection->transpose());
     }
+
+    /** @test */
+    public function it_can_handle_null_values()
+    {
+        $collection = new Collection([
+            null,
+        ]);
+
+        $expected = new Collection();
+
+        $this->assertEquals($expected, $collection->transpose());
+    }
 }

From a0ca00df57abb42759e1c7b07c11e924636f5db5 Mon Sep 17 00:00:00 2001
From: =?UTF-8?q?Michael=20Lundb=C3=B8l?= <ml@napp.dk>
Date: Sat, 6 Jan 2018 02:31:34 +0100
Subject: [PATCH 2/2] fix implimentation

---
 src/macros/transpose.php |  8 ++------
 tests/TransposeTest.php  | 16 ++++++++++++++++
 2 files changed, 18 insertions(+), 6 deletions(-)

diff --git a/src/macros/transpose.php b/src/macros/transpose.php
index e0e2856..c330dd5 100644
--- a/src/macros/transpose.php
+++ b/src/macros/transpose.php
@@ -16,14 +16,10 @@
 
     $firstItem = $this->first();
 
-    if (! $firstItem instanceof Countable) {
-        return new static();
-    }
-
-    $expectedLength = count($firstItem);
+    $expectedLength = is_array($firstItem) || $firstItem instanceof Countable ? count($firstItem) : 0;
 
     array_walk($this->items, function ($row) use ($expectedLength) {
-        if (count($row) !== $expectedLength) {
+        if ((is_array($row) || $row instanceof Countable) && count($row) !== $expectedLength) {
             throw new \LengthException("Element's length must be equal.");
         }
     });
diff --git a/tests/TransposeTest.php b/tests/TransposeTest.php
index 9e743bf..46c63b0 100644
--- a/tests/TransposeTest.php
+++ b/tests/TransposeTest.php
@@ -161,4 +161,20 @@ public function it_can_handle_null_values()
 
         $this->assertEquals($expected, $collection->transpose());
     }
+
+    /** @test */
+    public function it_can_handle_collections_values()
+    {
+        $collection = new Collection([
+            new Collection([1, 2, 3]),
+        ]);
+
+        $expected = new Collection([
+            new Collection([1]),
+            new Collection([2]),
+            new Collection([3]),
+        ]);
+
+        $this->assertEquals($expected, $collection->transpose());
+    }
 }