Merge branch 'improvement/19'

Close #19

Author: michalbundyra

src/Table/Row.php

@@ -125,7 +125,7 @@ public function render(array $columnWidths, Decorator $decorator, $padding = 0)
 
         // If there is no single column, create a column which spans over the
         // entire row
-        if (count($this->columns) === 0) {
+        if (! $this->columns) {
             $this->appendColumn(new Column(null, null, count($columnWidths)));
         }
 

src/Table/Table.php

@@ -157,7 +157,7 @@ public function setOptions(array $options)
      */
     public function setColumnWidths(array $columnWidths)
     {
-        if (count($columnWidths) === 0) {
+        if (! $columnWidths) {
             throw new Exception\InvalidArgumentException('You must supply at least one column');
         }
 
@@ -342,7 +342,7 @@ public function appendRow($row)
     public function render()
     {
         // There should be at least one row
-        if (count($this->rows) === 0) {
+        if (! $this->rows) {
             throw new Exception\UnexpectedValueException('No rows were added to the table yet');
         }