diff --git a/pom.xml b/pom.xml
index 0d422d4..f62c5ba 100644
--- a/pom.xml
+++ b/pom.xml
@@ -4,7 +4,7 @@
 
     <groupId>org.docopt</groupId>
     <artifactId>docopt</artifactId>
-    <version>0.1-SNAPSHOT</version>
+    <version>0.1c</version>
     <packaging>jar</packaging>
 
     <name>docopt parser for jvm</name>
@@ -13,7 +13,7 @@
     <properties>
         <project.build.sourceEncoding>UTF-8</project.build.sourceEncoding>
         <project.reporting.outputEncoding>UTF-8</project.reporting.outputEncoding>
-        <scala.version>2.10.0</scala.version>
+        <scala.version>2.11.2</scala.version>
     </properties>
 
     <repositories>
@@ -46,12 +46,12 @@
         <dependency>
             <groupId>org.scala-lang</groupId>
             <artifactId>scala-library</artifactId>
-            <version>2.10.0</version>
+            <version>2.11.2</version>
         </dependency>
         <dependency>
             <groupId>org.scalatest</groupId>
-            <artifactId>scalatest_2.10</artifactId>
-            <version>2.0.M5b</version>
+            <artifactId>scalatest_2.11</artifactId>
+            <version>2.2.1-M3</version>
             <scope>test</scope>
         </dependency>
         <dependency>
@@ -134,7 +134,7 @@
         <plugin>
           <groupId>org.scalatest</groupId>
           <artifactId>scalatest-maven-plugin</artifactId>
-          <version>1.0-M2</version>
+          <version>1.0</version>
           <configuration>
             <reportsDirectory>${project.build.directory}/surefire-reports</reportsDirectory>
             <junitxml>.</junitxml>
diff --git a/src/main/scala/org/docopt/Docopt.scala b/src/main/scala/org/docopt/Docopt.scala
index c60f4ba..2016ead 100644
--- a/src/main/scala/org/docopt/Docopt.scala
+++ b/src/main/scala/org/docopt/Docopt.scala
@@ -22,7 +22,7 @@ object Docopt {
             help: Boolean = true,
             version: String = "",
             optionsFirst: Boolean = false): Map[String, Any] = {
-    val collected = PatternParser.docopt(usage, argv.mkString(" "), help, version, optionsFirst)
+    val collected = PatternParser.docopt(usage, argv.filter(_ != ""), help, version, optionsFirst)
     val tupled:Seq[(String, Any)] = collected.map(pattern => pattern match {
       case o@Option(l,s,a,value:Value) => (o.name ,extractValue(value))
       case Argument(name,value:Value) => (name, extractValue(value))
diff --git a/src/main/scala/org/docopt/PatternMatcher.scala b/src/main/scala/org/docopt/PatternMatcher.scala
index 7877620..163d962 100644
--- a/src/main/scala/org/docopt/PatternMatcher.scala
+++ b/src/main/scala/org/docopt/PatternMatcher.scala
@@ -49,10 +49,8 @@ object PatternMatcher {
   private def collectSameName(matched: ChildPattern,
                               originalValue: Value,
                               collected: SeqPat): SeqPat = {
-    // http://stackoverflow.com/questions/11394034/why-scalas-pattern-maching-does-not-work-in-for-loops-for-type-matching
-    // http://www.scala-lang.org/node/2187
-    val sameName = (for (a@(_a:ChildPattern) <- collected
-                         if a.name == matched.name) yield a).toList
+    val (psameName, nonSameName) = collected.partition { case a:ChildPattern => (a.name == matched.name) }
+    val sameName = psameName.asInstanceOf[Seq[Pattern with ChildPattern]]
 
     def childPatternUpdateValue(child: ChildPattern, newValue: Value) = child match {
       case Argument(n, _) => Argument(n, newValue)
@@ -72,7 +70,7 @@ object PatternMatcher {
             collected ++ List(childPatternUpdateValue(matched, IntValue(1)))
           case head :: tail => head.value match {
             case IntValue(i) =>
-              childPatternUpdateValue(head, IntValue(1 + i)) :: tail
+              nonSameName ++ (childPatternUpdateValue(head, IntValue(1 + i)) :: tail)
           }
         }
       // we must update the list or start a new one.
@@ -82,9 +80,9 @@ object PatternMatcher {
             collected ++ List(childPatternUpdateValue(matched, matched.value match {case StringValue(v_) => ManyStringValue(List(v_)) case x => x}))
           case head :: tail => matched.value match {
             case ManyStringValue(s_) =>
-              childPatternUpdateValue(head, ManyStringValue(s ++ s_)) :: tail
+              nonSameName ++ (childPatternUpdateValue(head, ManyStringValue(s ++ s_)) :: tail)
             case StringValue(s_) =>
-              childPatternUpdateValue(head, ManyStringValue(s ++ List(s_))) :: tail
+              nonSameName ++ (childPatternUpdateValue(head, ManyStringValue(s ++ List(s_))) :: tail)
           }
         }
       case _ => collected ++ List(childPatternUpdateValue(matched, matched.value))
diff --git a/src/main/scala/org/docopt/PatternParser.scala b/src/main/scala/org/docopt/PatternParser.scala
index 3c74064..4fe75ca 100644
--- a/src/main/scala/org/docopt/PatternParser.scala
+++ b/src/main/scala/org/docopt/PatternParser.scala
@@ -171,8 +171,9 @@ object PatternParser {
 
   private def extractLongOptionValue(longOption: String) =
     if (longOption.exists(_ == '=')) {
+      val Splitter = """^(.*?)=(.*)$""".r
       try {
-      val Array(long, value) = longOption.split("=")
+        val Splitter(long, value) = longOption //val Array(long, value) = longOption.split("=")
         (long, Some(value))
       } catch {
         case _:Throwable => throw new UnparsableOptionException(longOption)
@@ -217,8 +218,9 @@ object PatternParser {
     case head :: tail => head :: clarifyLongOptionAmbiguities(tail, options)
   }
 
-  def parseArgv(argv: String, options: SeqOpt, optionFirst:Boolean = false) =
-    parseArgvRecursive(clarifyLongOptionAmbiguities(tokenStream(argv), options), options, optionFirst)
+  //def parseArgv(argv: String, options: SeqOpt, optionFirst:Boolean = false) : (SeqOpt, SeqPat) = parseArgv(argv.split("""\s+"""), options, optionFirst)
+  def parseArgv(argv: Array[String], options: SeqOpt, optionFirst:Boolean = false) : (SeqOpt, SeqPat) =
+    parseArgvRecursive(clarifyLongOptionAmbiguities(argv.toList, options), options, optionFirst)
 
   private def parseArgvRecursive(tokens: Tokens, options: SeqOpt, optionFirst: Boolean, ret: List[Pattern] = Nil): (SeqOpt, SeqPat) =
     tokens match {
@@ -241,7 +243,7 @@ object PatternParser {
 
 
   private def tokenStream(source: String, split: Boolean = true): Tokens =
-    source.split("\\s+").filter(_ != "").toList
+    source.split("""\s+""").filter(_ != "").toList
 
   // keep only the Usage: part, remove everything after
   def printableUsage(doc: String): String = {
@@ -259,7 +261,7 @@ object PatternParser {
     "( " + words.tail.map(x => if (x == programName) ") | (" else x).mkString(" ") + " )"
   }
 
-  def docopt(doc: String, argv: String = "", help: Boolean = true, version: String = "", optionsFirst: Boolean = false): SeqPat = {
+  def docopt(doc: String, argv: Array[String] = Array[String](), help: Boolean = true, version: String = "", optionsFirst: Boolean = false): SeqPat = {
     val usage = formalUsage(printableUsage(doc))
     val options = parseOptionDescriptions(doc)
     val (options_, pattern) = parsePattern(usage, options)
diff --git a/src/test/scala/org/docopt/PatternParserFunSpec.scala b/src/test/scala/org/docopt/PatternParserFunSpec.scala
index b9518f5..c9007a1 100644
--- a/src/test/scala/org/docopt/PatternParserFunSpec.scala
+++ b/src/test/scala/org/docopt/PatternParserFunSpec.scala
@@ -239,30 +239,30 @@ class PatternParserFunSpec extends FunSpec {
                        Option("-v", "--verbose"),
                        Option("-f", "--file", 1))
     it("should parse correctly: %s".format("")) {
-        assert (PP.parseArgv("", options) == (options, Nil))
+        assert (PP.parseArgv(Array[String](), options) == (options, Nil))
     }
 
     it("should parse correctly: %s".format("-h")) {
-        assert (PP.parseArgv("-h", options) ==
+        assert (PP.parseArgv(Array("-h"), options) ==
           (options, List(Option("-h","",0,BooleanValue(value = true)))))
     }
 
     it("should parse correctly: %s".format("-h --verbose")) {
-        assert (PP.parseArgv("-h --verbose", options) ==
+        assert (PP.parseArgv("-h --verbose".split("""\s+"""), options) ==
                 (options,
                  List(Option("-h","",0,BooleanValue(value = true)),
                       Option("-v","--verbose",0,BooleanValue(value = true)))))
     }
 
     it("should parse correctly: %s".format("-h --file f.txt")) {
-        assert (PP.parseArgv("-h --file f.txt", options) ==
+        assert (PP.parseArgv("-h --file f.txt".split("""\s+"""), options) ==
                 (options,
                   List(Option("-h","",0,BooleanValue(value = true)),
                        Option("-f","--file",1,StringValue("f.txt")))))
     }
 
     it("should parse correctly: %s".format("-h --file f.txt arg")) {
-        assert (PP.parseArgv("-h --file f.txt arg", options) ==
+        assert (PP.parseArgv("-h --file f.txt arg".split("""\s+"""), options) ==
                 (options,
                   List(Option("-h","",0,BooleanValue(value = true)),
                        Option("-f","--file",1,StringValue("f.txt")),
@@ -270,7 +270,7 @@ class PatternParserFunSpec extends FunSpec {
     }
 
     it("should parse correctly: %s".format("-h --file f.txt arg arg2")) {
-        assert (PP.parseArgv("-h --file f.txt arg arg2", options) ==
+        assert (PP.parseArgv("-h --file f.txt arg arg2".split("""\s+"""), options) ==
                 (options,
                   List(Option("-h","",0,BooleanValue(value = true)),
                        Option("-f","--file",1,StringValue("f.txt")),
@@ -279,7 +279,7 @@ class PatternParserFunSpec extends FunSpec {
     }
 
     it("should parse correctly: %s".format("-h arg -- -v")) {
-        assert (PP.parseArgv("-h arg -- -v", options) ==
+        assert (PP.parseArgv("-h arg -- -v".split("""\s+"""), options) ==
                 (options,
                   List(Option("-h","",0,BooleanValue(value = true)),
                        Argument("", StringValue("arg")),
@@ -290,7 +290,7 @@ class PatternParserFunSpec extends FunSpec {
   describe("long options error handling") {
     it("it should intercept a non existant option") {
       intercept[UnconsumedTokensException] {
-        PP.docopt("Usage: prog", "--non-existant", help = false, version = "", optionsFirst = false)
+        PP.docopt("Usage: prog", Array("--non-existant"), help = false, version = "", optionsFirst = false)
       }
     }
 
@@ -300,7 +300,7 @@ class PatternParserFunSpec extends FunSpec {
   --version
   --verbose"""
       intercept[RuntimeException] {
-        PP.docopt(usage, "--ver", help = false, "", optionsFirst = false)
+        PP.docopt(usage, Array("--ver"), help = false, "", optionsFirst = false)
       }
     }
 
@@ -308,19 +308,19 @@ class PatternParserFunSpec extends FunSpec {
       // since the option is defined to have an argument, the implicit ')' is
       // consumed by the parseOption
       intercept[MissingEnclosureException] {
-        PP.docopt("Usage: prog --conflict\n\n--conflict ARG", "", help = false, "", optionsFirst = false)
+        PP.docopt("Usage: prog --conflict\n\n--conflict ARG", Array(""), help = false, "", optionsFirst = false)
       }
     }
 
     it("it should intercept a reversed conflicting definition") {
       intercept[UnexpectedArgumentException] {
-        PP.docopt("Usage: prog --long=ARG\n\n --long", "", help = false, "", optionsFirst = false)
+        PP.docopt("Usage: prog --long=ARG\n\n --long", Array(""), help = false, "", optionsFirst = false)
       }
     }
 
     it("it should intercept a missing argument") {
       intercept[MissingArgumentException] {
-        PP.docopt("Usage: prog --long ARG\n\n --long ARG", "--long", help = false, "", optionsFirst = false)
+        PP.docopt("Usage: prog --long ARG\n\n --long ARG", Array("--long"), help = false, "", optionsFirst = false)
       }
     }
 
@@ -331,7 +331,7 @@ Usage: prog --derp
 
 Options:
     --derp"""
-        PP.docopt(doc, "--derp=ARG", help = false, "", optionsFirst = false)
+        PP.docopt(doc, Array("--derp=ARG"), help = false, "", optionsFirst = false)
       }
     }
   }
@@ -339,25 +339,25 @@ Options:
   describe("short options error handling") {
     it("it should detect conflicting definitions") {
       intercept[UnparsableOptionException] {
-        PP.docopt("Usage: prog -x\n\n-x this\n-x that", "", help = false, "", optionsFirst = false)
+        PP.docopt("Usage: prog -x\n\n-x this\n-x that", Array(""), help = false, "", optionsFirst = false)
       }
     }
 
     it("it should detect undefined options") {
       intercept[UnconsumedTokensException] {
-        PP.docopt("Usage: prog", "-x", help = false, "", optionsFirst = false)
+        PP.docopt("Usage: prog", Array("-x"), help = false, "", optionsFirst = false)
       }
     }
 
     it("it should detect conflicting definitions with arguments") {
       intercept[MissingEnclosureException] {
-        PP.docopt("Usage: prog -x\n\n-x ARG", "", help = false, "", optionsFirst = false)
+        PP.docopt("Usage: prog -x\n\n-x ARG", Array(""), help = false, "", optionsFirst = false)
       }
     }
 
     it("it should detect missing arguments") {
       intercept[MissingArgumentException] {
-        PP.docopt("Usage: prog -x ARG\n\n-x ARG", "-x", help = false, "", optionsFirst = false)
+        PP.docopt("Usage: prog -x ARG\n\n-x ARG", Array("-x"), help = false, "", optionsFirst = false)
       }
     }
   }
@@ -365,24 +365,24 @@ Options:
   describe("[]|{}|() matching") {
     it("it should detect missing ]") {
       intercept[MissingEnclosureException] {
-        PP.docopt("Usage: prog [a [b]", "", help = false, "", optionsFirst = false)
+        PP.docopt("Usage: prog [a [b]", Array(""), help = false, "", optionsFirst = false)
       }
     }
 
     it("it should detect extra )") {
       intercept[UnconsumedTokensException] {
-        PP.docopt("Usage: prog [a [b] ] c )", "", help = false, "", optionsFirst = false)
+        PP.docopt("Usage: prog [a [b] ] c )", Array(""), help = false, "", optionsFirst = false)
       }
     }
   }
 
   describe("double-dash support") {
     it("it should handle correctly '--'") {
-      PP.docopt("Usage: prog [-o] [--] <arg>\n\n-o", "-- -o", help = false, "", optionsFirst = false)
+      PP.docopt("Usage: prog [-o] [--] <arg>\n\n-o", "-- -o".split("""\s+"""), help = false, "", optionsFirst = false)
     }
 
     it("it should handle correctly '--' swapped") {
-      PP.docopt("Usage: prog [-o] [--] <arg>\n\n -o", "-o 1", help = false, "", optionsFirst = false)
+      PP.docopt("Usage: prog [-o] [--] <arg>\n\n -o", "-o 1".split("""\s+"""), help = false, "", optionsFirst = false)
     }
   }
 }