StringUtil.trimEnd()

git-svn-id: svn+ssh://src.earth.threerings.net/narya/trunk@5215 542714f4-19e9-0310-aa3c-eee0fc999fb1

src/as/com/threerings/util/StringUtil.as

@@ -21,11 +21,11 @@
 
 package com.threerings.util {
 
+import com.threerings.util.env.Environment;
+
 import flash.utils.ByteArray;
 import flash.utils.Dictionary;
 
-import com.threerings.util.env.Environment;
-
 public class StringUtil
 {
     /**
@@ -237,7 +237,7 @@ public class StringUtil
     }
 
     /**
-     * Utility function that strips whitespace from the ends of a String.
+     * Utility function that strips whitespace from the beginning and end of a String.
      */
     public static function trim (str :String) :String
     {
@@ -256,6 +256,19 @@ public class StringUtil
         }
     }
 
+    /**
+     * Utility function that strips whitespace from the end of a String.
+     */
+    public static function trimEnd (str :String) :String
+    {
+        var endIdx :int = str.length - 1;
+        while (isWhitespace(str.charAt(endIdx))) {
+            endIdx--;
+        }
+
+        return (endIdx >= 0 ? str.slice(0, endIdx + 1) : "");
+    }
+
     /**
      * @return true if the specified String is == to a single whitespace character.
      */
@@ -493,7 +506,7 @@ public class StringUtil
             str += "\n";
         }
         return str;
-        
+
     }