update help

.gitignore

@@ -14,3 +14,4 @@
 # Dependency directories (remove the comment below to include it)
 # vendor/
 .idea
+target

build.sh

@@ -0,0 +1,4 @@
+#!/usr/bin/env bash
+
+CGO_ENABLED=0  GOOS=linux GOARCH=amd64 go build -o target/rdb-linux-amd64 ./
+go build -o target/rdb-darwin ./

cmd.go

@@ -13,22 +13,23 @@ This is a tool to parse Redis' RDB files
 Options:
   -c command, including: json/memory/aof
   -o output file path
-  -n number of result 
+  -n number of result, using in 
   -port listen port for flame graph web service
   -sep separator for flamegraph, rdb will separate key by it, default value is ":". 
 		supporting multi separators: -sep sep1 -sep sep2 
 
 Examples:
+parameters between '[' and ']' is optional
 1. convert rdb to json
   rdb -c json -o dump.json dump.rdb
 2. generate memory report
   rdb -c memory -o memory.csv dump.rdb
 3. convert to aof file
   rdb -c aof -o dump.aof dump.rdb
 4. get largest keys
-  rdb -c bigkey -o dump.aof dump.rdb
+  rdb -c bigkey [-o dump.aof] [-n 10] dump.rdb
 5. draw flamegraph
-  rdb -c flamegraph -port 16379 -sep : dump.rdb
+  rdb -c flamegraph [-port 16379] [-sep :] dump.rdb
 `
 
 type separators []string

core/zset.go

@@ -22,6 +22,9 @@ func (dec *Decoder) readZSet(zset2 bool) ([]*model.ZSetEntry, error) {
 		} else {
 			score, err = dec.readLiteralFloat()
 		}
+		if err != nil {
+			return nil, err
+		}
 		entries = append(entries, &model.ZSetEntry{
 			Member: string(member),
 			Score:  score,