Fix ineffassign (#388)

* Fix ineffassign

* upgrade readme

README.md

@@ -26,6 +26,7 @@ LedisDB now supports multiple different databases as backends.
 
 Create a workspace and checkout ledisdb source
 
+```shell
 git clone git@github.com:ledisdb/ledisdb.git
 cd ledisdb
 
@@ -34,6 +35,7 @@ Create a workspace and checkout ledisdb source
 
 make
 make test
+```
 
 Then you will find all the binary build on `./bin` directory.
 
@@ -66,7 +68,6 @@ Then you will find all the binary build on `./bin` directory.
 
 If the RocksDB API changes, LedisDB may not build successfully. LedisDB currently supports RocksDB version 5.1 or later.
 
-
 ## Choose store database
 
 LedisDB now supports goleveldb, leveldb, rocksdb, and RAM. It will use goleveldb by default. 
@@ -79,7 +80,7 @@ Choosing a store database to use is very simple.
 
 + Set in command flag
 
-        ledis-server -config=/etc/ledis.conf -db_name=leveldb
+    ledis -config=/etc/ledis.conf -db_name=leveldb
 
 Flag command set will overwrite config setting.
 
@@ -95,13 +96,14 @@ If you don't use a configuration, LedisDB will use the default for you.
 
 ## Server Example
 
+```shell
 //set run environment if not
 source dev.sh
 
-    ./bin/ledis-server -config=/etc/ledis.conf
+./bin/ledis -config=/etc/ledis.conf
 
 //another shell
-    ./bin/ledis-cli -p 6380
+./bin/ledis cli -p 6380
 
 ledis 127.0.0.1:6380> set a 1
 OK
@@ -114,10 +116,12 @@ If you don't use a configuration, LedisDB will use the default for you.
 
 curl http://127.0.0.1:11181/0/GET/hello?type=json
 → {"GET":"world"}
+```
 
 
 ## Package Example
 
+```go
 import (
     lediscfg "github.com/ledisdb/ledisdb/config"
     "github.com/ledisdb/ledisdb/ledis"
@@ -131,16 +135,18 @@ If you don't use a configuration, LedisDB will use the default for you.
 db.Set(key, value)
 
 db.Get(key)
-
+```
 
 ## Replication Example
 
 Set slaveof in config or dynamiclly
 
-    ledis-cli -p 6381 
+```shell
+ledis cli -p 6381 
 
 ledis 127.0.0.1:6381> slaveof 127.0.0.1 6380
 OK
+```
 
 ## Cluster support
 
@@ -180,7 +186,6 @@ See [Clients](https://github.com/ledisdb/ledisdb/wiki/Clients) to find or contri
 
 + [pika](https://github.com/Qihoo360/pika)
 
-
 ## Donate
 
 If you like the project and want to buy me a cola, you can through: 

ledis/dump.go

@@ -106,13 +106,7 @@ func (l *Ledis) Dump(w io.Writer) error {
 		}
 	}
 
-	if err = wb.Flush(); err != nil {
-		return err
-	}
-
-	compressBuf = nil
-
-	return nil
+	return wb.Flush()
 }
 
 // LoadDumpFile clears all data and loads dump file to db
@@ -207,9 +201,6 @@ func (l *Ledis) LoadDump(r io.Reader) (*DumpHead, error) {
 		return nil, err
 	}
 
-	deKeyBuf = nil
-	deValueBuf = nil
-
 	if l.r != nil {
 		if err := l.r.UpdateCommitID(h.CommitID); err != nil {
 			return nil, err

rpl/file_store.go

@@ -123,7 +123,7 @@ func (s *FileStore) GetLog(id uint64, l *Log) error {
 }
 
 func (s *FileStore) FirstID() (uint64, error) {
-	id := uint64(0)
+	var id uint64
 
 	s.rm.RLock()
 	if len(s.rs) > 0 {
@@ -408,7 +408,6 @@ func (ts tableReaders) check() error {
 			return fmt.Errorf("invalid index %d in table %s", ts[i].index, ts[i])
 		}
 
-		first = ts[i].first
 		last = ts[i].last
 		index = ts[i].index
 	}