Merge pull request #6148 from buty4649/add-enumerable-grep_v

Add Enumerable#grep_v to mruby-enum-ext

mrbgems/mruby-enum-ext/mrblib/enum.rb

@@ -840,6 +840,17 @@ module Enumerable
 
   alias filter select
 
+  def grep_v(pattern, &block)
+    ary = []
+    self.each{|*val|
+      sv = val.__svalue
+      unless pattern === sv
+        ary.push((block)? block.call(*val): sv)
+      end
+    }
+    ary
+  end
+
   ##
   # call-seq:
   #   enum.tally -> a_hash

mrbgems/mruby-enum-ext/test/enum.rb

@@ -195,3 +195,10 @@ end
 assert("Enumerable#tally") do
   assert_equal({"a"=>1, "b"=>2, "c"=>1}, ["a", "b", "c", "b"].tally)
 end
+
+assert("Enumerable#grep_v") do
+  a = [1, 2, 3, 4, 5, 0]
+  assert_equal [1, 5, 0], a.grep_v(2..4)
+  assert_equal [1, 2, 3, 4, 5, 0], a.grep_v(6..8)
+  assert_equal [2, 4, 6, 8, 10], a.grep_v(0) {|v| v * 2}
+end