added 'split' pipe that was missing, and fixed broken loops

Mark.php

@@ -149,7 +149,7 @@ static public function up($template, $context = [], $options = []) {
 			}
 
 			// Evaluating an array, which might be a block expression.
-			else if (is_array($ctx)) {
+			else if (is_array($ctx) || $child) {
 				$result = self::_eval($ctx, $filters, $child);
 			}
 
@@ -406,6 +406,9 @@ private static function _pipes() {
 			'limit' => function($arr, $count, $idx = 0) {
 				return array_slice($arr, $idx, $count);
 			},
+			'split' => function($str, $separator = ',') {
+				return explode($separator, $str);
+			},
 			'choose' => function($bool, $iffy, $elsy = false) {
 				if (!!$bool) return $iffy;
 				return $elsy ? $elsy : '';

tests.php

@@ -31,6 +31,7 @@
     'motto' => "life is like a box of chocolates",
     'obj' => [ 'truthy' => true, 'falsy' => false ],
     'chars' => [ ["a","b","c"], ["d","e","f"] ],
+    'splits' => "a,b,c and d",
 ];
 
 function beforeEach() {
@@ -391,6 +392,23 @@ public function getName() {
 //    expect($result)->toEqual("Num: 123.0");
 });
 
+it("resolves string split into array", function () use ($context) {
+    $template = "{{splits|split}}";
+    $result = Mark::up($template, $context);
+    expect($result[0])->toEqual("a");
+    expect($result[1])->toEqual("b");
+    expect($result[2])->toEqual("c and d");
+
+    $template = "{{splits|split> and }}";
+    $result = Mark::up($template, $context);
+    expect($result[0])->toEqual("a,b,c");
+    expect($result[1])->toEqual("d");
+
+    $template = "{{splits|split|join> + }}";
+    $result = Mark::up($template, $context);
+    expect($result)->toEqual("a + b + c and d");
+});
+
 it("resolves multiple pipes on simple array", function () use ($context) {
     $template = "brothers: {{brothers|sort|join> @ }}";
     $result = Mark::up($template, $context);