From 63bac70a1913f5b2b0f9d811fdaa928707d60889 Mon Sep 17 00:00:00 2001
From: Vladimir Mihailenco <vladimir.webdev@gmail.com>
Date: Thu, 26 Jan 2017 15:51:34 +0200
Subject: [PATCH] Add ZRemRangeByLex.

---
 commands.go      |  7 +++++++
 commands_test.go | 27 +++++++++++++++++++++++++++
 2 files changed, 34 insertions(+)

diff --git a/commands.go b/commands.go
index 2e50cda..676fad3 100644
--- a/commands.go
+++ b/commands.go
@@ -170,6 +170,7 @@ type Cmdable interface {
 	ZRem(key string, members ...interface{}) *IntCmd
 	ZRemRangeByRank(key string, start, stop int64) *IntCmd
 	ZRemRangeByScore(key, min, max string) *IntCmd
+	ZRemRangeByLex(key, min, max string) *IntCmd
 	ZRevRange(key string, start, stop int64) *StringSliceCmd
 	ZRevRangeWithScores(key string, start, stop int64) *ZSliceCmd
 	ZRevRangeByScore(key string, opt ZRangeBy) *StringSliceCmd
@@ -1468,6 +1469,12 @@ func (c *cmdable) ZRemRangeByScore(key, min, max string) *IntCmd {
 	return cmd
 }
 
+func (c *cmdable) ZRemRangeByLex(key, min, max string) *IntCmd {
+	cmd := NewIntCmd("zremrangebylex", key, min, max)
+	c.process(cmd)
+	return cmd
+}
+
 func (c *cmdable) ZRevRange(key string, start, stop int64) *StringSliceCmd {
 	cmd := NewStringSliceCmd("zrevrange", key, start, stop)
 	c.process(cmd)
diff --git a/commands_test.go b/commands_test.go
index caa2e35..2692885 100644
--- a/commands_test.go
+++ b/commands_test.go
@@ -2429,6 +2429,33 @@ var _ = Describe("Commands", func() {
 			Expect(val).To(Equal([]redis.Z{{2, "two"}, {3, "three"}}))
 		})
 
+		It("should ZRemRangeByLex", func() {
+			zz := []redis.Z{
+				{0, "aaaa"},
+				{0, "b"},
+				{0, "c"},
+				{0, "d"},
+				{0, "e"},
+				{0, "foo"},
+				{0, "zap"},
+				{0, "zip"},
+				{0, "ALPHA"},
+				{0, "alpha"},
+			}
+			for _, z := range zz {
+				err := client.ZAdd("zset", z).Err()
+				Expect(err).NotTo(HaveOccurred())
+			}
+
+			n, err := client.ZRemRangeByLex("zset", "[alpha", "[omega").Result()
+			Expect(err).NotTo(HaveOccurred())
+			Expect(n).To(Equal(int64(6)))
+
+			vals, err := client.ZRange("zset", 0, -1).Result()
+			Expect(err).NotTo(HaveOccurred())
+			Expect(vals).To(Equal([]string{"ALPHA", "aaaa", "zap", "zip"}))
+		})
+
 		It("should ZRevRange", func() {
 			zAdd := client.ZAdd("zset", redis.Z{1, "one"})
 			Expect(zAdd.Err()).NotTo(HaveOccurred())