Doc 4226 hash tces (#3106)

* DOC-4226 hash examples for docs

* DOC-4226 added hash scan examples

* DOC-4226 fixed test output issues

---------

Co-authored-by: Vladyslav Vildanov <117659936+vladvildanov@users.noreply.github.com>

Author: andy-stark-redis

doctests/hash_tutorial_test.go

@@ -0,0 +1,281 @@
+// EXAMPLE: hash_tutorial
+// HIDE_START
+package example_commands_test
+
+import (
+	"context"
+	"fmt"
+
+	"github.com/redis/go-redis/v9"
+)
+
+// HIDE_END
+
+func ExampleClient_set_get_all() {
+	ctx := context.Background()
+
+	rdb := redis.NewClient(&redis.Options{
+		Addr:     "localhost:6379",
+		Password: "", // no password docs
+		DB:       0,  // use default DB
+	})
+
+	// REMOVE_START
+	rdb.Del(ctx, "bike:1")
+	// REMOVE_END
+
+	// STEP_START set_get_all
+	hashFields := []string{
+		"model", "Deimos",
+		"brand", "Ergonom",
+		"type", "Enduro bikes",
+		"price", "4972",
+	}
+
+	res1, err := rdb.HSet(ctx, "bike:1", hashFields).Result()
+
+	if err != nil {
+		panic(err)
+	}
+
+	fmt.Println(res1) // >>> 4
+
+	res2, err := rdb.HGet(ctx, "bike:1", "model").Result()
+
+	if err != nil {
+		panic(err)
+	}
+
+	fmt.Println(res2) // >>> Deimos
+
+	res3, err := rdb.HGet(ctx, "bike:1", "price").Result()
+
+	if err != nil {
+		panic(err)
+	}
+
+	fmt.Println(res3) // >>> 4972
+
+	cmdReturn := rdb.HGetAll(ctx, "bike:1")
+	res4, err := cmdReturn.Result()
+
+	if err != nil {
+		panic(err)
+	}
+
+	fmt.Println(res4)
+	// >>> map[brand:Ergonom model:Deimos price:4972 type:Enduro bikes]
+
+	type BikeInfo struct {
+		Model string `redis:"model"`
+		Brand string `redis:"brand"`
+		Type  string `redis:"type"`
+		Price int    `redis:"price"`
+	}
+
+	var res4a BikeInfo
+
+	if err := cmdReturn.Scan(&res4a); err != nil {
+		panic(err)
+	}
+
+	fmt.Printf("Model: %v, Brand: %v, Type: %v, Price: $%v\n",
+		res4a.Model, res4a.Brand, res4a.Type, res4a.Price)
+	// >>> Model: Deimos, Brand: Ergonom, Type: Enduro bikes, Price: $4972
+	// STEP_END
+
+	// Output:
+	// 4
+	// Deimos
+	// 4972
+	// map[brand:Ergonom model:Deimos price:4972 type:Enduro bikes]
+	// Model: Deimos, Brand: Ergonom, Type: Enduro bikes, Price: $4972
+}
+
+func ExampleClient_hmget() {
+	ctx := context.Background()
+
+	rdb := redis.NewClient(&redis.Options{
+		Addr:     "localhost:6379",
+		Password: "", // no password docs
+		DB:       0,  // use default DB
+	})
+
+	// REMOVE_START
+	rdb.Del(ctx, "bike:1")
+	// REMOVE_END
+
+	hashFields := []string{
+		"model", "Deimos",
+		"brand", "Ergonom",
+		"type", "Enduro bikes",
+		"price", "4972",
+	}
+
+	_, err := rdb.HSet(ctx, "bike:1", hashFields).Result()
+
+	if err != nil {
+		panic(err)
+	}
+
+	// STEP_START hmget
+	cmdReturn := rdb.HMGet(ctx, "bike:1", "model", "price")
+	res5, err := cmdReturn.Result()
+
+	if err != nil {
+		panic(err)
+	}
+
+	fmt.Println(res5) // >>> [Deimos 4972]
+
+	type BikeInfo struct {
+		Model string `redis:"model"`
+		Brand string `redis:"-"`
+		Type  string `redis:"-"`
+		Price int    `redis:"price"`
+	}
+
+	var res5a BikeInfo
+
+	if err := cmdReturn.Scan(&res5a); err != nil {
+		panic(err)
+	}
+
+	fmt.Printf("Model: %v, Price: $%v\n", res5a.Model, res5a.Price)
+	// >>> Model: Deimos, Price: $4972
+	// STEP_END
+
+	// Output:
+	// [Deimos 4972]
+	// Model: Deimos, Price: $4972
+}
+
+func ExampleClient_hincrby() {
+	ctx := context.Background()
+
+	rdb := redis.NewClient(&redis.Options{
+		Addr:     "localhost:6379",
+		Password: "", // no password docs
+		DB:       0,  // use default DB
+	})
+
+	// REMOVE_START
+	rdb.Del(ctx, "bike:1")
+	// REMOVE_END
+
+	hashFields := []string{
+		"model", "Deimos",
+		"brand", "Ergonom",
+		"type", "Enduro bikes",
+		"price", "4972",
+	}
+
+	_, err := rdb.HSet(ctx, "bike:1", hashFields).Result()
+
+	if err != nil {
+		panic(err)
+	}
+
+	// STEP_START hincrby
+	res6, err := rdb.HIncrBy(ctx, "bike:1", "price", 100).Result()
+
+	if err != nil {
+		panic(err)
+	}
+
+	fmt.Println(res6) // >>> 5072
+
+	res7, err := rdb.HIncrBy(ctx, "bike:1", "price", -100).Result()
+
+	if err != nil {
+		panic(err)
+	}
+
+	fmt.Println(res7) // >>> 4972
+	// STEP_END
+
+	// Output:
+	// 5072
+	// 4972
+}
+
+func ExampleClient_incrby_get_mget() {
+	ctx := context.Background()
+
+	rdb := redis.NewClient(&redis.Options{
+		Addr:     "localhost:6379",
+		Password: "", // no password docs
+		DB:       0,  // use default DB
+	})
+
+	// REMOVE_START
+	rdb.Del(ctx, "bike:1:stats")
+	// REMOVE_END
+
+	// STEP_START incrby_get_mget
+	res8, err := rdb.HIncrBy(ctx, "bike:1:stats", "rides", 1).Result()
+
+	if err != nil {
+		panic(err)
+	}
+
+	fmt.Println(res8) // >>> 1
+
+	res9, err := rdb.HIncrBy(ctx, "bike:1:stats", "rides", 1).Result()
+
+	if err != nil {
+		panic(err)
+	}
+
+	fmt.Println(res9) // >>> 2
+
+	res10, err := rdb.HIncrBy(ctx, "bike:1:stats", "rides", 1).Result()
+
+	if err != nil {
+		panic(err)
+	}
+
+	fmt.Println(res10) // >>> 3
+
+	res11, err := rdb.HIncrBy(ctx, "bike:1:stats", "crashes", 1).Result()
+
+	if err != nil {
+		panic(err)
+	}
+
+	fmt.Println(res11) // >>> 1
+
+	res12, err := rdb.HIncrBy(ctx, "bike:1:stats", "owners", 1).Result()
+
+	if err != nil {
+		panic(err)
+	}
+
+	fmt.Println(res12) // >>> 1
+
+	res13, err := rdb.HGet(ctx, "bike:1:stats", "rides").Result()
+
+	if err != nil {
+		panic(err)
+	}
+
+	fmt.Println(res13) // >>> 3
+
+	res14, err := rdb.HMGet(ctx, "bike:1:stats", "crashes", "owners").Result()
+
+	if err != nil {
+		panic(err)
+	}
+
+	fmt.Println(res14) // >>> [1 1]
+	// STEP_END
+
+	// Output:
+	// 1
+	// 2
+	// 3
+	// 1
+	// 1
+	// 3
+	// [1 1]
+}