* zin: refactor

zin/wg/dtable/v1.php

@@ -1,5 +1,4 @@
 <?php
-
 namespace zin;
 
 class dtable extends wg

zin/wg/row/v1.php

@@ -1,18 +1,22 @@
 <?php
-
 namespace zin;
 
 class row extends wg
 {
-    static $defineProps = 'justify,align';
+    static $defineProps = 'justify?:string, align?:string';
 
     protected function build()
     {
-        $justify = empty($this->prop('justify')) ? 'start' : $this->prop('justify');
-        $align = empty($this->prop('align')) ? 'start' : $this->prop('align');
+        list($justify, $align) = $this->prop(array('justify', 'align'));
 
-        return div(
-            setClass("row justify-$justify items-$align"),
+        return div
+        (
+            setClass
+            (
+                'row',
+                empty($justify) ? null : "justify-$justify",
+                empty($align) ? null : "items-$align"
+            ),
             set($this->props->skip(array_keys(static::getDefinedProps()))),
             $this->children()
         );