add english version

en/code/src/apps/ch.5.6/mongodb/main.go

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+// Example code for Chapter 5.6 from "Build Web Application with Golang"
+// Purpose: Shows you have to perform basic CRUD operations for a mongodb driver.
+package main
+
+import (
+	"fmt"
+	"labix.org/v2/mgo"
+	"labix.org/v2/mgo/bson"
+)
+
+type Person struct {
+	Name  string
+	Phone string
+}
+
+func checkError(err error) {
+	if err != nil {
+		panic(err)
+	}
+}
+
+const (
+	DB_NAME       = "test"
+	DB_COLLECTION = "people"
+)
+
+func main() {
+	session, err := mgo.Dial("localhost")
+	checkError(err)
+	defer session.Close()
+
+	session.SetMode(mgo.Monotonic, true)
+
+	c := session.DB(DB_NAME).C(DB_COLLECTION)
+	err = c.DropCollection()
+	checkError(err)
+
+	ale := Person{"Ale", "555-5555"}
+	cla := Person{"Cla", "555-1234"}
+
+	fmt.Println("Inserting")
+	err = c.Insert(&ale, &cla)
+	checkError(err)
+
+	fmt.Println("Updating")
+	ale.Phone = "555-0101"
+	err = c.Update(bson.M{"name": "Ale"}, &ale)
+
+	fmt.Println("Querying")
+	result := Person{}
+	err = c.Find(bson.M{"name": "Ale"}).One(&result)
+	checkError(err)
+	fmt.Println("Phone:", result.Phone)
+
+	fmt.Println("Deleting")
+	err = c.Remove(bson.M{"name": "Ale"})
+	checkError(err)
+}

en/code/src/apps/ch.5.6/mongodb/readme.md

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+##Setup for `ch.5.6` for MongoDB
+
+- Step 1) Install and run MongoDB
+- Step 2) Launch the MongoDB daemon (mongod) to start the server.
+- Step 3) Run `go get` to download and install the remote packages.
+- Step 4) Execute the program with `go run main.go`

en/code/src/apps/ch.5.6/redis/main.go

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+// Example code for Chapter 5.6 from "Build Web Application with Golang"
+// Purpose: Shows you have to perform basic CRUD operations for a redis driver.
+package main
+
+import (
+	"fmt"
+	"github.com/astaxie/goredis"
+)
+
+func checkError(err error) {
+	if err != nil {
+		panic(err)
+	}
+}
+
+const (
+	DB_PORT = "9191"
+	DB_URL  = "127.0.0.1"
+)
+
+func main() {
+	var client goredis.Client
+
+	// Set the default port in Redis
+	client.Addr = DB_URL + ":" + DB_PORT
+
+	// string manipulation
+	fmt.Println("Inserting")
+	err := client.Set("a", []byte("hello"))
+	checkError(err)
+
+	// list operation
+	vals := []string{"a", "b", "c", "d"}
+	for _, v := range vals {
+		err = client.Rpush("l", []byte(v))
+		checkError(err)
+	}
+	fmt.Println("Updating")
+	err = client.Set("a", []byte("a is for apple"))
+	checkError(err)
+	err = client.Rpush("l", []byte("e"))
+	checkError(err)
+
+	fmt.Println("Querying")
+	val, err := client.Get("a")
+	checkError(err)
+	fmt.Println(string(val))
+
+	dbvals, err := client.Lrange("l", 0, 4)
+	checkError(err)
+	for i, v := range dbvals {
+		println(i, ":", string(v))
+	}
+
+	fmt.Println("Deleting")
+	_, err = client.Del("l")
+	checkError(err)
+	_, err = client.Del("a")
+	checkError(err)
+}

en/code/src/apps/ch.5.6/redis/readme.md

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+##Setup for `ch.5.6` for Redis
+
+- Step 1) Install and run Redis
+- Step 2) Launch the Redis server matching the DB constants.
+
+		DB_PORT = "9191"
+		DB_URL  = "127.0.0.1"
+
+- Step 3) Run `go get` to download and install the remote packages.
+- Step 4) Execute the program with `go run main.go`