[Truffle] Refactoring Array#zip.

Author: bjfish

truffle/src/main/java/org/jruby/truffle/nodes/core/ArrayNodes.java

@@ -4587,29 +4587,25 @@ public RubyArray zipObjectObject(RubyArray array, Object[] others) {
 
         @Specialization(guards = {"!isOtherSingleObjectArray"})
         public Object zipObjectObjectNotSingleObject(VirtualFrame frame, RubyArray array, Object[] others) {
-            RubyBasicObject proc = RubyArguments.getBlock(frame.getArguments());
-            if (proc == null) {
-                proc = nil();
-            }
-            return ruby(frame, "zip_internal(nil, *others)", "others", new RubyArray(getContext().getCoreLibrary().getArrayClass(), others, others.length), "block", proc);
+            return zipRuby(frame, others);
         }
 
         @Specialization(guards = {"!isOtherSingleIntegerFixnumArray"})
         public Object zipObjectObjectNotSingleInteger(VirtualFrame frame, RubyArray array, Object[] others) {
-            RubyBasicObject proc = RubyArguments.getBlock(frame.getArguments());
-            if (proc == null) {
-                proc = nil();
-            }
-            return ruby(frame, "zip_internal(block, *others)", "others", new RubyArray(getContext().getCoreLibrary().getArrayClass(), others, others.length), "block", proc);
+            return zipRuby(frame, others);
         }
 
         @Specialization(guards = {"!isObject"})
         public Object zipObjectObjectNotObject(VirtualFrame frame, RubyArray array, Object[] others) {
+            return zipRuby(frame, others);
+        }
+
+        private Object zipRuby(VirtualFrame frame, Object[] others) {
             RubyBasicObject proc = RubyArguments.getBlock(frame.getArguments());
             if (proc == null) {
                 proc = nil();
             }
-            return ruby(frame, "zip_internal(block, *others)", "others", new RubyArray(getContext().getCoreLibrary().getArrayClass(), others, others.length), "block", proc);
+            return ruby(frame, "zip_internal(*others, &block)", "others", new RubyArray(getContext().getCoreLibrary().getArrayClass(), others, others.length), "block", proc);
         }
 
     }

truffle/src/main/ruby/core/rubinius/common/array.rb

@@ -91,8 +91,7 @@ def first(n = undefined)
     Array.new self[0, n]
   end
 
-  # MODIFIED to handle blocks from java
-  def zip_internal(block, *others)
+  def zip_internal(*others)
     out = Array.new(size) { [] }
     others = others.map do |ary|
       if ary.respond_to?(:to_ary)
@@ -110,8 +109,8 @@ def zip_internal(block, *others)
       others.each { |ary| slot << ary.at(i) }
     end
 
-    unless block.nil?
-      out.each { |ary| block.call(ary) }
+    if block_given?
+      out.each { |ary| yield ary }
       return nil
     end