Add `Comparable#uniq`; CRuby2.4

1 files changed, 15 insertions, 0 deletions

diff --git a/mrbgems/mruby-enum-lazy/mrblib/lazy.rb b/mrbgems/mruby-enum-lazy/mrblib/lazy.rb
index c98681edf..9227abe8a 100644
--- a/mrbgems/mruby-enum-lazy/mrblib/lazy.rb
+++ b/mrbgems/mruby-enum-lazy/mrblib/lazy.rb
@@ -158,6 +158,21 @@ class Enumerator
       }
     end
 
+    def uniq(&block)
+      hash = {}
+      Lazy.new(self){|yielder, val|
+        if block
+          v = block.call(val)
+        else
+          v = val
+        end
+        unless hash.include?(v)
+          yielder << val
+          hash[v] = val
+        end
+      }
+    end
+
     alias force to_a
   end
 end