Merge pull request redis#399 from badboy/doc-zrevrangebylex

Documented ZREVRANGEBYLEX

Author: soveran

commands.json

@@ -2213,6 +2213,32 @@
     "since": "2.8.9",
     "group": "sorted_set"
   },
+  "ZREVRANGEBYLEX": {
+    "summary": "Return a range of members in a sorted set, by lexicographical range, ordered from higher to lower strings.",
+    "complexity": "O(log(N)+M) with N being the number of elements in the sorted set and M the number of elements being returned. If M is constant (e.g. always asking for the first 10 elements with LIMIT), you can consider it O(log(N)).",
+    "arguments": [
+      {
+        "name": "key",
+        "type": "key"
+      },
+      {
+        "name": "max",
+        "type": "string"
+      },
+      {
+        "name": "min",
+        "type": "string"
+      },
+      {
+        "command": "LIMIT",
+        "name": ["offset", "count"],
+        "type": ["integer", "integer"],
+        "optional": true
+      }
+    ],
+    "since": "2.9.9",
+    "group": "sorted_set"
+  },
   "ZRANGEBYSCORE": {
     "summary": "Return a range of members in a sorted set, by score",
     "complexity": "O(log(N)+M) with N being the number of elements in the sorted set and M the number of elements being returned. If M is constant (e.g. always asking for the first 10 elements with LIMIT), you can consider it O(log(N)).",

commands/zrevrangebylex.md

@@ -0,0 +1,16 @@
+When all the elements in a sorted set are inserted with the same score, in order to force lexicographical ordering, this command returns all the elements in the sorted set at `key` with a value between `max` and `min`.
+
+Apart from the reversed ordering, `ZREVRANGEBYLEX` is similar to `ZRANGEBYLEX`.
+
+@return
+
+@array-reply: list of elements in the specified score range.
+
+@examples
+
+```cli
+ZADD myzset 0 a 0 b 0 c 0 d 0 e 0 f 0 g
+ZREVRANGEBYLEX myzset [c -
+ZREVRANGEBYLEX myzset (c -
+ZREVRANGEBYLEX myzset (g [aaa
+```