From 7e5d7bab97e12f791f56394c6ecd2269055ddad4 Mon Sep 17 00:00:00 2001
From: Alexander <nimrod97@gmail.com>
Date: Mon, 15 Feb 2016 16:12:19 +0300
Subject: [PATCH] trim and empty

---
 source/com/kemsky/filters/empty.as        | 19 +++++++++++++++++
 source/com/kemsky/filters/trim.as         | 25 +++++++++++++++++++++++
 testSrc/com/kemsky/filters/TestFilters.as | 21 +++++++++++++++++++
 3 files changed, 65 insertions(+)
 create mode 100644 source/com/kemsky/filters/empty.as
 create mode 100644 source/com/kemsky/filters/trim.as

diff --git a/source/com/kemsky/filters/empty.as b/source/com/kemsky/filters/empty.as
new file mode 100644
index 0000000..084e1fa
--- /dev/null
+++ b/source/com/kemsky/filters/empty.as
@@ -0,0 +1,19 @@
+/*
+ *  Copyright: (c) 2016. Turtsevich Alexander
+ *
+ *  Licensed under the MIT license: http://www.opensource.org/licenses/mit-license.html
+ */
+
+package com.kemsky.filters
+{
+    import com.kemsky.support.toValue;
+
+    public function empty(val:*):Function
+    {
+        return function (item:*):Boolean
+        {
+            var value:* = toValue(item, val);
+            return (value as String) == null || (value as String).length == 0;
+        };
+    }
+}
diff --git a/source/com/kemsky/filters/trim.as b/source/com/kemsky/filters/trim.as
new file mode 100644
index 0000000..7919cfb
--- /dev/null
+++ b/source/com/kemsky/filters/trim.as
@@ -0,0 +1,25 @@
+/*
+ *  Copyright: (c) 2016. Turtsevich Alexander
+ *
+ *  Licensed under the MIT license: http://www.opensource.org/licenses/mit-license.html
+ */
+
+package com.kemsky.filters
+{
+    import com.kemsky.support.toValue;
+
+    import mx.utils.StringUtil;
+
+    public function trim(val:*):Function
+    {
+        return function (item:*):String
+        {
+            var value:* = toValue(item, val);
+            if(value is String)
+            {
+                return StringUtil.trim(value);
+            }
+            return "";
+        };
+    }
+}
diff --git a/testSrc/com/kemsky/filters/TestFilters.as b/testSrc/com/kemsky/filters/TestFilters.as
index 5c80e00..7156df3 100644
--- a/testSrc/com/kemsky/filters/TestFilters.as
+++ b/testSrc/com/kemsky/filters/TestFilters.as
@@ -17,6 +17,27 @@ package com.kemsky.filters
         {
         }
 
+        [Test]
+        public function testTrim():void
+        {
+            var s:Stream = $("", null, "    ", "test  ");
+            var e:Stream = s.map(trim(_));
+            assertEquals(e.length, 4);
+            assertEquals(e.first, "");
+            assertEquals(e.second, "");
+            assertEquals(e.third, "");
+            assertEquals(e.fourth, "test");
+        }
+
+        [Test]
+        public function testEmpty():void
+        {
+            var s:Stream = $("", null, "", "test");
+            var e:Stream = s.filter(not(empty(_)));
+            assertEquals(e.length, 1);
+            assertEquals(e.first, "test");
+        }
+
         [Test]
         public function testInvoke():void
         {