1 files changed, 73 insertions, 0 deletions
diff --git a/mrbgems/mruby-array-ext/mrblib/array.rb b/mrbgems/mruby-array-ext/mrblib/array.rb
new file mode 100644
index 000000000..83eaaa35e
--- /dev/null
+++ b/mrbgems/mruby-array-ext/mrblib/array.rb
@@ -0,0 +1,73 @@
+class Array
+  def uniq!
+    ary = self.dup
+    result = []
+    while ary.size > 0
+      result << ary.shift
+      ary.delete(result.last)
+    end
+    self.replace(result)
+  end
+
+  def uniq
+    self.dup.uniq!
+  end
+
+  def -(elem)
+    raise TypeError, "can't convert to Array" unless elem.class == Array
+
+    hash = {}
+    array = []
+    elem.each { |x| hash[x] = true }
+    self.each { |x| array << x unless hash[x] }
+    array
+  end
+
+  def |(elem)
+    raise TypeError, "can't convert to Array" unless elem.class == Array
+
+    (self + elem).uniq!
+  end
+
+  def &(elem)
+    raise TypeError, "can't convert to Array" unless elem.class == Array
+
+    hash = {}
+    array = []
+    elem.each{|v| hash[v] = true }
+    self.each do |v|
+      if hash[v]
+        array << v
+        hash.delete v
+      end
+    end
+    array
+  end
+
+  def flatten(depth=nil)
+    ar = []
+    self.each do |e|
+      if e.is_a?(Array) && (depth.nil? || depth > 0)
+        ar += e.flatten(depth.nil? ? nil : depth - 1)
+      else
+        ar << e
+      end
+    end
+    ar
+  end
+
+  def flatten!
+    self.replace(self.flatten)
+  end
+
+  def compact
+    result = self.dup
+    result.compact!
+    result
+  end
+
+  def compact!
+    result = self.select { |e| e != nil }
+    self.replace(result)
+  end
+end