1 files changed, 30 insertions, 0 deletions
diff --git a/mrblib/struct.rb b/mrblib/struct.rb
new file mode 100644
index 000000000..b11f59f2a
--- /dev/null
+++ b/mrblib/struct.rb
@@ -0,0 +1,30 @@
+#
+#  Struct
+#
+class Struct
+  # 15.2.18.4.4
+  def each(&block)
+    self.class.members.each{|field|
+      block.call(self[field])
+    }
+    self
+  end
+
+  # 15.2.18.4.5
+  def each_pair(&block)
+    self.class.members.each{|field|
+      block.call(field.to_sym, self[field])
+    }
+    self
+  end
+
+  # 15.2.18.4.7
+  def select(&block)
+    ary = []
+    self.class.members.each{|field|
+      val = self[field]
+      ary.push(val) if block.call(val)
+    }
+    ary
+  end
+end