delete

README.md

@@ -26,10 +26,11 @@ db = RocksDB::DB.new("tmp/db1")
 
 db.put("foo", "1")
 db.get("foo")      # => "1"
+db.delete("foo")
 
-db.get("xxx")      # => ""
-db.get?("xxx")     # => nil
-db.get!("xxx")     # raise RocksDB::NotFound.new("xxx")
+db.get("foo")      # => ""
+db.get?("foo")     # => nil
+db.get!("foo")     # raise RocksDB::NotFound.new("foo")
 
 db.close
 ```
@@ -39,7 +40,7 @@ db.close
 #### 0.2.0
 
 - [x] `get`, `put`
-- [ ] `delete`
+- [x] `delete`
 
 ## Testing
 

spec/rocksdb_spec.cr

@@ -17,6 +17,14 @@ describe RocksDB do
       db.close
     end
 
+    it "Delete" do
+      db = RocksDB::DB.new(path)
+      db.get("key").should eq("value")
+      db.delete("key")
+      db.get("key").should eq("")
+      db.close
+    end
+
     it "Empty keys" do
       db = RocksDB::DB.new(path)
       db.get("xxx").should eq("")

src/rocksdb/commands.cr

@@ -1,7 +1,7 @@
 module RocksDB::Commands
   def get?(key : String) : String?
     ptr = rocksdb_get(db, @read_options.raw, key, key.bytesize, @len)
-    @len.value == 0 ? nil : String.new(ptr)
+    @len.value == 0 ? nil : String.new(ptr, @len.value)
   end
 
   def get(key : String) : String
@@ -27,4 +27,8 @@ module RocksDB::Commands
   def []=(key : String, value : String)
     put(key, value)
   end
+
+  def delete(key : String)
+    rocksdb_delete(db, @write_options.raw, key, key.bytesize)
+  end
 end