Merge pull request #15 from hegdeashwin/develop

Develop

Author: Ashwin Hegde

codes/var-types-pointer-constants/constants.go renamed to codes/ch1_var-types-pointer-constants/constants.go

@@ -21,6 +21,8 @@ func main() {
 	/**
 	 * Declare a variable with string type and assign a string value to it;
 	 * Type is optional.
+	 * 
+	 * Note: Declaring variable and do not use is an error in Go
 	 */
 	var message string
 	message = "Welcome to Go World!"

codes/var-types-pointer-constants/helloworld.go renamed to codes/ch1_var-types-pointer-constants/helloworld.go

@@ -0,0 +1,40 @@
+package main
+
+import "fmt"
+
+/**
+ * User defined type Profile act as struct type
+ */
+type Profile struct {
+	name string
+	username string
+	message string
+}
+
+/**
+ * Define a CreateMessage function;
+ * Either specify string for each or just make string at last parameter and first 2 will be asssumed as string
+ * Also specify the return type which in case here is string
+ *
+ * func <function-name>([param1, param2, ...]) <return-type> { ... }
+ */
+func CreateMessage(name, username, message string) string {
+	return message + ", " + name + " (" + username + ")"
+}
+
+/**
+ * Define a Greeting function;
+ */
+func Greeting(github Profile) {
+	fmt.Println(CreateMessage(github.name, github.username, github.message))
+}
+
+func main() {
+
+	var github = Profile{"Ashwin Hegde", "hegdeashwin", "Welcome to Go world!"}
+
+	/**
+	 * Call the function and pass the data to the function
+	 */
+	Greeting(github)
+}

codes/var-types-pointer-constants/pointer.go renamed to codes/ch1_var-types-pointer-constants/pointer.go

@@ -0,0 +1,57 @@
+package main
+
+import "fmt"
+
+/**
+ * User defined type Profile act as struct type
+ */
+type Profile struct {
+	name string
+	username string
+	message string
+}
+
+/**
+ * Define a CreateMessage function;
+ * Either specify string for each or just make string at last parameter and first 2 will be asssumed as string
+ * Also specify the return type which in case here is string
+ *
+ * func <function-name>([param1, param2, ...]) (<return-type1>, <return-type2>) { ... }
+ */
+func CreateMessage(name, username, message string) (string, string) {
+
+	/**
+	 * return <first-return>, <second-return>, ...
+	 */
+	return "\n" + message + " " + name, "You are authorize to access the system: " + username + "\n"
+}
+
+/**
+ * Define a Greeting function;
+ */
+func Greeting(github Profile) {
+	
+
+	welcome, info := CreateMessage(github.name, github.username, github.message)
+
+	/**
+	 * Commenting exact below "Println(welcome) line would throw an error "welcome declared and not used"
+	 * In case you want to ignore the welcome declaration and use info => replace welcome with _ as below syntax
+	 *
+	 * E.g. _, info := CreateMessage(github.name, github.username, github.message)
+	 */
+	fmt.Println(welcome)
+	fmt.Println(info)
+
+	// fmt.Println(_)  // Cannot use _ as value
+}
+
+func main() {
+
+	var github = Profile{"Ashwin Hegde", "hegdeashwin", "Welcome to Go world!"}
+
+	/**
+	 * Call the function and pass the data to the function
+	 */
+	Greeting(github)
+}

codes/var-types-pointer-constants/user-defined-types.go renamed to codes/ch1_var-types-pointer-constants/user-defined-types.go

@@ -0,0 +1,31 @@
+package main
+
+import "fmt"
+
+/**
+ * User defined type Profile act as struct type
+ */
+type Profile struct {
+	name string
+	username string
+	message string
+}
+
+/**
+ * Define a Greeting function;
+ */
+func Greeting(github Profile) {
+	fmt.Println("Name: ", github.name)
+	fmt.Println("Username: ", github.username)
+	fmt.Println("Message: ", github.message)
+}
+
+func main() {
+
+	var github = Profile{"Ashwin Hegde", "hegdeashwin", "Welcome to Go world!"}
+
+	/**
+	 * Call the function and pass the data to the function
+	 */
+	Greeting(github)
+}

codes/ch2_functions/function-1-return.go

@@ -0,0 +1,60 @@
+package main
+
+import "fmt"
+
+/**
+ * User defined type Profile act as struct type
+ */
+type Profile struct {
+	name string
+	username string
+	message string
+}
+
+/**
+ * Define a CreateMessage function;
+ * Either specify string for each or just make string at last parameter and first 2 will be asssumed as string
+ * Also specify the return type which in case here is string
+ *
+ * func <function-name>([param1, param2, ...]) (<naming-return-val1><return-type1>, <naming-return-val1><return-type2>) { ... }
+ */
+func CreateMessage(name, username, message string) (welcome string, info string) {
+
+	/**
+	 * <naming-return-val1> = string
+	 * <naming-return-val2> = string
+	 */
+	welcome = "\n" + message + " " + name
+	info = "You are authorize to access the system: " + username + "\n"
+
+	return
+}
+
+/**
+ * Define a Greeting function;
+ */
+func Greeting(github Profile) {
+	
+	wel, inf := CreateMessage(github.name, github.username, github.message)
+
+	/**
+	 * Commenting exact below "Println(wel) line would throw an error "wel declared and not used"
+	 * In case you want to ignore the wel declaration and use info => replace wel with _ as below syntax
+	 *
+	 * E.g. _, info := CreateMessage(github.name, github.username, github.message)
+	 */
+	fmt.Println(wel)
+	fmt.Println(inf)
+
+	// fmt.Println(_)  // Cannot use _ as value
+}
+
+func main() {
+
+	var github = Profile{"Ashwin Hegde", "hegdeashwin", "Welcome to Go world!"}
+
+	/**
+	 * Call the function and pass the data to the function
+	 */
+	Greeting(github)
+}