Add SETNX

elcuervo · Aug 5, 2011 · 22f47a5 · 22f47a5
1 parent bb1d418
commit 22f47a5
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Showing 4 changed files with 15 additions and 1 deletion.
diff --git a/README.md b/README.md
@@ -112,7 +112,7 @@
   * SELECT index &#10003;
   * SETBIT key offset value
   * SETEX key seconds value &#10003;
-  * SETNX key value
+  * SETNX key value &#10003;
   * SETRANGE key offset value
   * SHUTDOWN
   * SINTER key [key ...]

diff --git a/index.html b/index.html
@@ -464,6 +464,13 @@ <h3>Scenarios</h3>
         assert_equal(l.get("foo"), "Hello")
       },
 
+      "SETNX should set a key only if the key does not exists": function(){
+        l.setnx("foo", "Hello");
+        l.setnx("foo", "World");
+
+        assert_equal(l.get("foo"), "Hello");
+      },
+
     });
 
   </script>

diff --git a/lodis.coffee b/lodis.coffee
@@ -343,3 +343,5 @@ class @Lodis
     this.set(key, value)
     this.expire(key, expire)
 
+  setnx: (key, value) -> this.set(key, value) if !this.exists(key)
+
diff --git a/lodis.js b/lodis.js