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AN INTRODUCTION TO PROGRAMMING IN GO The * and & operators. In Go a pointer is represented using the * (asterisk) character followed by the type of the stored value. In the zero function xPtr is a pointer to an int. * is also used to “dereference” pointer variables. Dereferencing a pointer gives us access to the value the AN INTRODUCTION TO PROGRAMMING IN GO Packages. Go was designed to be a language that encourages good software engineering practices. An important part of high quality software is code reuse – embodied in the principle “Don't Repeat Yourself.”. As we saw in chapter 7 functions are the first layer we turn to allow code reuse. Go also provides another mechanism for codereuse
TESTING — AN INTRODUCTION TO PROGRAMMING IN GO The go test command will look for any tests in any of the files in the current folder and run them. Tests are identified by starting a function with the word Test and taking one argument of type *testing.T. In our case since we're testing the Average function we name the test function TestAverage. Once we have the testing functionsetup we
GETTING STARTED
CONCURRENCY
Goroutines. A goroutine is a function that is capable of running concurrently with other functions. To create a goroutine we use the keyword go followed by a function invocation: package main import "fmt" func f (n int) { for i := 0; i < 10; i++ { fmt.Println (n, ":",i) } } func main ()
YOUR FIRST PROGRAM
Your First Program. Traditionally the first program you write in any programming language is called a “Hello World” program – a program that simply outputs Hello World to your terminal. Let's write one using Go. First create a new folder where we can store ourprogram. Create
AN INTRODUCTION TO WEB DEVELOPMENT IN GO STRUCTS AND INTERFACES VARIABLES — AN INTRODUCTION TO PROGRAMMING IN GO Variables in Go are created by first using the var keyword, then specifying the variable name ( x ), the type ( string) and finally assigning a value to the variable ( Hello World ). The last step is optional so an alternative way of writing the program would be likethis:
AN INTRODUCTION TO PROGRAMMING IN GO © 2021 Caleb Doxsey. Cover Art: © 2012 Abigail Doxsey Anderson. All Rights Reserved. Portions of this page may contain modifications basedon work created and
AN INTRODUCTION TO PROGRAMMING IN GO The * and & operators. In Go a pointer is represented using the * (asterisk) character followed by the type of the stored value. In the zero function xPtr is a pointer to an int. * is also used to “dereference” pointer variables. Dereferencing a pointer gives us access to the value the AN INTRODUCTION TO PROGRAMMING IN GO Packages. Go was designed to be a language that encourages good software engineering practices. An important part of high quality software is code reuse – embodied in the principle “Don't Repeat Yourself.”. As we saw in chapter 7 functions are the first layer we turn to allow code reuse. Go also provides another mechanism for codereuse
TESTING — AN INTRODUCTION TO PROGRAMMING IN GO The go test command will look for any tests in any of the files in the current folder and run them. Tests are identified by starting a function with the word Test and taking one argument of type *testing.T. In our case since we're testing the Average function we name the test function TestAverage. Once we have the testing functionsetup we
GETTING STARTED
CONCURRENCY
Goroutines. A goroutine is a function that is capable of running concurrently with other functions. To create a goroutine we use the keyword go followed by a function invocation: package main import "fmt" func f (n int) { for i := 0; i < 10; i++ { fmt.Println (n, ":",i) } } func main ()
YOUR FIRST PROGRAM
Your First Program. Traditionally the first program you write in any programming language is called a “Hello World” program – a program that simply outputs Hello World to your terminal. Let's write one using Go. First create a new folder where we can store ourprogram. Create
AN INTRODUCTION TO WEB DEVELOPMENT IN GO STRUCTS AND INTERFACESGOLANG-BOOK.COM
An Introduction to Programming in Go A short, concise introduction to computer programming using the language Go. Designed by Google, Go is a general purpose programming language with modern features, clean syntax and a robust well-documented common library, making it an ideal language to learn as your first programming language. AN INTRODUCTION TO PROGRAMMING IN GO Packages. Go was designed to be a language that encourages good software engineering practices. An important part of high quality software is code reuse – embodied in the principle “Don't Repeat Yourself.”. As we saw in chapter 7 functions are the first layer we turn to allow code reuse. Go also provides another mechanism for codereuse
GETTING STARTED
Getting Started. Computer programming is the art, craft and science of writing programs which define how computers operate. This book will teach you how to write computer programs using a programming language designed by Google named Go. AN INTRODUCTION TO WEB DEVELOPMENT IN GO Go is a compiled programming language. The Go compiler takes source code and translates it into the native language the computer speaks (machine code). Go programs are broken up into packages, with a package called main being the entry point for a program. In AN INTRODUCTION TO WEB DEVELOPMENT IN GO A variable is like a box: The assignment statement x = "Hello World" is how we put a value in the box and when we want to retrieve the value out of the box, we just use its name. There are many different ways to create variables in go. The grammar states: VarDecl = "var" ( VarSpec | " (" { VarSpec ";" } ")" ) . AN INTRODUCTION TO WEB DEVELOPMENT IN GO Introduction. This book will teach you the basics of server-side web development with Go and the Google App Engine platform. Although web deveopment is not particularly difficult when compared to other types of software development, it can be challenging due to the sheer number of technologies involved.THE CORE PACKAGES
The Core Packages. Instead of writing everything from scratch, most real world programming depends on our ability to interface with existing libraries. This chapter will take a look at some of the most commonly used packages included with Go. First a word of warning: although some of these libraries are fairly obvious (or have beenexplained in
AN INTRODUCTION TO WEB DEVELOPMENT IN GO Variables are an abstract concept which the Go compiler understands and translates into something a computer can actually use. A computer is very complex, but its basic architecture - the Von Neumann architecture - involves 3 components: A central processing unit (CPU) which actually performs the instructions generated by the Go compiler. NEXT STEPS — AN INTRODUCTION TO PROGRAMMING IN GO Next Steps. We now have all the information we need to write most Go programs. But it would be dangerous to conclude that therefore we are competent programmers. Programming is as much a craft as it is just having knowledge. This chapter will provide you with some suggestions about how best to master the craft of programming. VARIABLES — AN INTRODUCTION TO PROGRAMMING IN GO Variables in Go are created by first using the var keyword, then specifying the variable name ( x ), the type ( string) and finally assigning a value to the variable ( Hello World ). The last step is optional so an alternative way of writing the program would be likethis:
GOLANG-BOOK.COM
An Introduction to Programming in Go A short, concise introduction to computer programming using the language Go. Designed by Google, Go is a general purpose programming language with modern features, clean syntax and a robust well-documented common library, making it an ideal language to learn as your first programming language. AN INTRODUCTION TO PROGRAMMING IN GO Packages. Go was designed to be a language that encourages good software engineering practices. An important part of high quality software is code reuse – embodied in the principle “Don't Repeat Yourself.”. As we saw in chapter 7 functions are the first layer we turn to allow code reuse. Go also provides another mechanism for codereuse
AN INTRODUCTION TO PROGRAMMING IN GO The * and & operators. In Go a pointer is represented using the * (asterisk) character followed by the type of the stored value. In the zero function xPtr is a pointer to an int. * is also used to “dereference” pointer variables. Dereferencing a pointer gives us access to the value the AN INTRODUCTION TO PROGRAMMING IN GO © 2021 Caleb Doxsey. Cover Art: © 2012 Abigail Doxsey Anderson. All Rights Reserved. Portions of this page may contain modifications basedon work created and
GETTING STARTED
TESTING — AN INTRODUCTION TO PROGRAMMING IN GO The go test command will look for any tests in any of the files in the current folder and run them. Tests are identified by starting a function with the word Test and taking one argument of type *testing.T. In our case since we're testing the Average function we name the test function TestAverage. Once we have the testing functionsetup we
YOUR FIRST PROGRAM
Your First Program. Traditionally the first program you write in any programming language is called a “Hello World” program – a program that simply outputs Hello World to your terminal. Let's write one using Go. First create a new folder where we can store ourprogram. Create
CONCURRENCY
Goroutines. A goroutine is a function that is capable of running concurrently with other functions. To create a goroutine we use the keyword go followed by a function invocation: package main import "fmt" func f (n int) { for i := 0; i < 10; i++ { fmt.Println (n, ":",i) } } func main ()
VARIABLES — AN INTRODUCTION TO PROGRAMMING IN GO Variables in Go are created by first using the var keyword, then specifying the variable name ( x ), the type ( string) and finally assigning a value to the variable ( Hello World ). The last step is optional so an alternative way of writing the program would be likethis:
BOOTCAMP | GO RESOURCES Part 1 (no content) Part 2: Introduction, Machine Setup; Part 3: Background and Hello World; Part 4: Go Commands and Hello World; Part 5: Documentation, VariablesGOLANG-BOOK.COM
An Introduction to Programming in Go A short, concise introduction to computer programming using the language Go. Designed by Google, Go is a general purpose programming language with modern features, clean syntax and a robust well-documented common library, making it an ideal language to learn as your first programming language. AN INTRODUCTION TO PROGRAMMING IN GO Packages. Go was designed to be a language that encourages good software engineering practices. An important part of high quality software is code reuse – embodied in the principle “Don't Repeat Yourself.”. As we saw in chapter 7 functions are the first layer we turn to allow code reuse. Go also provides another mechanism for codereuse
AN INTRODUCTION TO PROGRAMMING IN GO The * and & operators. In Go a pointer is represented using the * (asterisk) character followed by the type of the stored value. In the zero function xPtr is a pointer to an int. * is also used to “dereference” pointer variables. Dereferencing a pointer gives us access to the value the AN INTRODUCTION TO PROGRAMMING IN GO © 2021 Caleb Doxsey. Cover Art: © 2012 Abigail Doxsey Anderson. All Rights Reserved. Portions of this page may contain modifications basedon work created and
GETTING STARTED
TESTING — AN INTRODUCTION TO PROGRAMMING IN GO The go test command will look for any tests in any of the files in the current folder and run them. Tests are identified by starting a function with the word Test and taking one argument of type *testing.T. In our case since we're testing the Average function we name the test function TestAverage. Once we have the testing functionsetup we
YOUR FIRST PROGRAM
Your First Program. Traditionally the first program you write in any programming language is called a “Hello World” program – a program that simply outputs Hello World to your terminal. Let's write one using Go. First create a new folder where we can store ourprogram. Create
CONCURRENCY
Goroutines. A goroutine is a function that is capable of running concurrently with other functions. To create a goroutine we use the keyword go followed by a function invocation: package main import "fmt" func f (n int) { for i := 0; i < 10; i++ { fmt.Println (n, ":",i) } } func main ()
VARIABLES — AN INTRODUCTION TO PROGRAMMING IN GO Variables in Go are created by first using the var keyword, then specifying the variable name ( x ), the type ( string) and finally assigning a value to the variable ( Hello World ). The last step is optional so an alternative way of writing the program would be likethis:
BOOTCAMP | GO RESOURCES Part 1 (no content) Part 2: Introduction, Machine Setup; Part 3: Background and Hello World; Part 4: Go Commands and Hello World; Part 5: Documentation, VariablesGOLANG-BOOK.COM
An Introduction to Programming in Go A short, concise introduction to computer programming using the language Go. Designed by Google, Go is a general purpose programming language with modern features, clean syntax and a robust well-documented common library, making it an ideal language to learn as your first programming language.GETTING STARTED
Getting Started. Computer programming is the art, craft and science of writing programs which define how computers operate. This book will teach you how to write computer programs using a programming language designed by Google named Go. AN INTRODUCTION TO WEB DEVELOPMENT IN GO Go is a compiled programming language. The Go compiler takes source code and translates it into the native language the computer speaks (machine code). Go programs are broken up into packages, with a package called main being the entry point for a program. In AN INTRODUCTION TO WEB DEVELOPMENT IN GO © 2021 Caleb Doxsey. All Rights Reserved. Portions of this page may contain modifications based on work created and shared by Google and used according to terms AN INTRODUCTION TO WEB DEVELOPMENT IN GO A variable is like a box: The assignment statement x = "Hello World" is how we put a value in the box and when we want to retrieve the value out of the box, we just use its name. There are many different ways to create variables in go. The grammar states: VarDecl = "var" ( VarSpec | " (" { VarSpec ";" } ")" ) . BOOTCAMP | GO RESOURCES Part 1 (no content) Part 2: Introduction, Machine Setup; Part 3: Background and Hello World; Part 4: Go Commands and Hello World; Part 5: Documentation, Variables FUNCTIONS — AN INTRODUCTION TO PROGRAMMING IN GO Functions. A function is an independent section of code that maps zero or more input parameters to zero or more output parameters. Functions (also known as procedures or subroutines) are often represented as a black box: (the black box represents the function) Until now the programs we have written in Go have used only one function: func main() {}
AN INTRODUCTION TO WEB DEVELOPMENT IN GO Variables are an abstract concept which the Go compiler understands and translates into something a computer can actually use. A computer is very complex, but its basic architecture - the Von Neumann architecture - involves 3 components: A central processing unit (CPU) which actually performs the instructions generated by the Go compiler. NEXT STEPS — AN INTRODUCTION TO PROGRAMMING IN GO Next Steps. We now have all the information we need to write most Go programs. But it would be dangerous to conclude that therefore we are competent programmers. Programming is as much a craft as it is just having knowledge. This chapter will provide you with some suggestions about how best to master the craft of programming.CONTROL STRUCTURES
Control Structures. Now that we know how to use variables it's time to start writing some useful programs. First let's write a program that counts to 10, starting from 1, with each number on its own line. Using what we've learned so far we could write this: package main import "fmt" func main () { fmt.Println (1) fmt.Println (2) fmt.Println (3GOLANG-BOOK.COM
An Introduction to Programming in Go A short, concise introduction to computer programming using the language Go. Designed by Google, Go is a general purpose programming language with modern features, clean syntax and a robust well-documented common library, making it an ideal language to learn as your first programming language. AN INTRODUCTION TO PROGRAMMING IN GO The * and & operators. In Go a pointer is represented using the * (asterisk) character followed by the type of the stored value. In the zero function xPtr is a pointer to an int. * is also used to “dereference” pointer variables. Dereferencing a pointer gives us access to the value the AN INTRODUCTION TO PROGRAMMING IN GO Packages. Go was designed to be a language that encourages good software engineering practices. An important part of high quality software is code reuse – embodied in the principle “Don't Repeat Yourself.”. As we saw in chapter 7 functions are the first layer we turn to allow code reuse. Go also provides another mechanism for codereuse
AN INTRODUCTION TO PROGRAMMING IN GO © 2021 Caleb Doxsey. Cover Art: © 2012 Abigail Doxsey Anderson. All Rights Reserved. Portions of this page may contain modifications basedon work created and
TESTING — AN INTRODUCTION TO PROGRAMMING IN GO The go test command will look for any tests in any of the files in the current folder and run them. Tests are identified by starting a function with the word Test and taking one argument of type *testing.T. In our case since we're testing the Average function we name the test function TestAverage. Once we have the testing functionsetup we
GETTING STARTED
CONCURRENCY
Goroutines. A goroutine is a function that is capable of running concurrently with other functions. To create a goroutine we use the keyword go followed by a function invocation: package main import "fmt" func f (n int) { for i := 0; i < 10; i++ { fmt.Println (n, ":",i) } } func main ()
FUNCTIONS — AN INTRODUCTION TO PROGRAMMING IN GO VARIABLES — AN INTRODUCTION TO PROGRAMMING IN GO Variables in Go are created by first using the var keyword, then specifying the variable name ( x ), the type ( string) and finally assigning a value to the variable ( Hello World ). The last step is optional so an alternative way of writing the program would be likethis:
STRUCTS AND INTERFACESGOLANG-BOOK.COM
An Introduction to Programming in Go A short, concise introduction to computer programming using the language Go. Designed by Google, Go is a general purpose programming language with modern features, clean syntax and a robust well-documented common library, making it an ideal language to learn as your first programming language. AN INTRODUCTION TO PROGRAMMING IN GO The * and & operators. In Go a pointer is represented using the * (asterisk) character followed by the type of the stored value. In the zero function xPtr is a pointer to an int. * is also used to “dereference” pointer variables. Dereferencing a pointer gives us access to the value the AN INTRODUCTION TO PROGRAMMING IN GO Packages. Go was designed to be a language that encourages good software engineering practices. An important part of high quality software is code reuse – embodied in the principle “Don't Repeat Yourself.”. As we saw in chapter 7 functions are the first layer we turn to allow code reuse. Go also provides another mechanism for codereuse
AN INTRODUCTION TO PROGRAMMING IN GO © 2021 Caleb Doxsey. Cover Art: © 2012 Abigail Doxsey Anderson. All Rights Reserved. Portions of this page may contain modifications basedon work created and
TESTING — AN INTRODUCTION TO PROGRAMMING IN GO The go test command will look for any tests in any of the files in the current folder and run them. Tests are identified by starting a function with the word Test and taking one argument of type *testing.T. In our case since we're testing the Average function we name the test function TestAverage. Once we have the testing functionsetup we
GETTING STARTED
CONCURRENCY
Goroutines. A goroutine is a function that is capable of running concurrently with other functions. To create a goroutine we use the keyword go followed by a function invocation: package main import "fmt" func f (n int) { for i := 0; i < 10; i++ { fmt.Println (n, ":",i) } } func main ()
FUNCTIONS — AN INTRODUCTION TO PROGRAMMING IN GO VARIABLES — AN INTRODUCTION TO PROGRAMMING IN GO Variables in Go are created by first using the var keyword, then specifying the variable name ( x ), the type ( string) and finally assigning a value to the variable ( Hello World ). The last step is optional so an alternative way of writing the program would be likethis:
STRUCTS AND INTERFACESGOLANG-BOOK.COM
An Introduction to Programming in Go A short, concise introduction to computer programming using the language Go. Designed by Google, Go is a general purpose programming language with modern features, clean syntax and a robust well-documented common library, making it an ideal language to learn as your first programming language. AN INTRODUCTION TO PROGRAMMING IN GO Packages. Go was designed to be a language that encourages good software engineering practices. An important part of high quality software is code reuse – embodied in the principle “Don't Repeat Yourself.”. As we saw in chapter 7 functions are the first layer we turn to allow code reuse. Go also provides another mechanism for codereuse
GETTING STARTED
Getting Started. Computer programming is the art, craft and science of writing programs which define how computers operate. This book will teach you how to write computer programs using a programming language designed by Google named Go. AN INTRODUCTION TO WEB DEVELOPMENT IN GO Go is a compiled programming language. The Go compiler takes source code and translates it into the native language the computer speaks (machine code). Go programs are broken up into packages, with a package called main being the entry point for a program. In AN INTRODUCTION TO WEB DEVELOPMENT IN GO © 2021 Caleb Doxsey. All Rights Reserved. Portions of this page may contain modifications based on work created and shared by Google and used according to termsYOUR FIRST PROGRAM
Your First Program. Traditionally the first program you write in any programming language is called a “Hello World” program – a program that simply outputs Hello World to your terminal. Let's write one using Go. First create a new folder where we can store ourprogram. Create
AN INTRODUCTION TO WEB DEVELOPMENT IN GO A variable is like a box: The assignment statement x = "Hello World" is how we put a value in the box and when we want to retrieve the value out of the box, we just use its name. There are many different ways to create variables in go. The grammar states: VarDecl = "var" ( VarSpec | " (" { VarSpec ";" } ")" ) . AN INTRODUCTION TO WEB DEVELOPMENT IN GO Introduction. This book will teach you the basics of server-side web development with Go and the Google App Engine platform. Although web deveopment is not particularly difficult when compared to other types of software development, it can be challenging due to the sheer number of technologies involved. BOOTCAMP | GO RESOURCES Part 1 (no content) Part 2: Introduction, Machine Setup; Part 3: Background and Hello World; Part 4: Go Commands and Hello World; Part 5: Documentation, Variables VARIABLES — AN INTRODUCTION TO PROGRAMMING IN GO Variables in Go are created by first using the var keyword, then specifying the variable name ( x ), the type ( string) and finally assigning a value to the variable ( Hello World ). The last step is optional so an alternative way of writing the program would be likethis:
GOLANG-BOOK.COM
An Introduction to Programming in Go A short, concise introduction to computer programming using the language Go. Designed by Google, Go is a general purpose programming language with modern features, clean syntax and a robust well-documented common library, making it an ideal language to learn as your first programming language. AN INTRODUCTION TO PROGRAMMING IN GO The * and & operators. In Go a pointer is represented using the * (asterisk) character followed by the type of the stored value. In the zero function xPtr is a pointer to an int. * is also used to “dereference” pointer variables. Dereferencing a pointer gives us access to the value the AN INTRODUCTION TO PROGRAMMING IN GO Packages. Go was designed to be a language that encourages good software engineering practices. An important part of high quality software is code reuse – embodied in the principle “Don't Repeat Yourself.”. As we saw in chapter 7 functions are the first layer we turn to allow code reuse. Go also provides another mechanism for codereuse
AN INTRODUCTION TO PROGRAMMING IN GO © 2021 Caleb Doxsey. Cover Art: © 2012 Abigail Doxsey Anderson. All Rights Reserved. Portions of this page may contain modifications basedon work created and
TESTING — AN INTRODUCTION TO PROGRAMMING IN GO The go test command will look for any tests in any of the files in the current folder and run them. Tests are identified by starting a function with the word Test and taking one argument of type *testing.T. In our case since we're testing the Average function we name the test function TestAverage. Once we have the testing functionsetup we
GETTING STARTED
CONCURRENCY
Goroutines. A goroutine is a function that is capable of running concurrently with other functions. To create a goroutine we use the keyword go followed by a function invocation: package main import "fmt" func f (n int) { for i := 0; i < 10; i++ { fmt.Println (n, ":",i) } } func main ()
FUNCTIONS — AN INTRODUCTION TO PROGRAMMING IN GO VARIABLES — AN INTRODUCTION TO PROGRAMMING IN GO Variables in Go are created by first using the var keyword, then specifying the variable name ( x ), the type ( string) and finally assigning a value to the variable ( Hello World ). The last step is optional so an alternative way of writing the program would be likethis:
STRUCTS AND INTERFACESGOLANG-BOOK.COM
An Introduction to Programming in Go A short, concise introduction to computer programming using the language Go. Designed by Google, Go is a general purpose programming language with modern features, clean syntax and a robust well-documented common library, making it an ideal language to learn as your first programming language. AN INTRODUCTION TO PROGRAMMING IN GO The * and & operators. In Go a pointer is represented using the * (asterisk) character followed by the type of the stored value. In the zero function xPtr is a pointer to an int. * is also used to “dereference” pointer variables. Dereferencing a pointer gives us access to the value the AN INTRODUCTION TO PROGRAMMING IN GO Packages. Go was designed to be a language that encourages good software engineering practices. An important part of high quality software is code reuse – embodied in the principle “Don't Repeat Yourself.”. As we saw in chapter 7 functions are the first layer we turn to allow code reuse. Go also provides another mechanism for codereuse
AN INTRODUCTION TO PROGRAMMING IN GO © 2021 Caleb Doxsey. Cover Art: © 2012 Abigail Doxsey Anderson. All Rights Reserved. Portions of this page may contain modifications basedon work created and
TESTING — AN INTRODUCTION TO PROGRAMMING IN GO The go test command will look for any tests in any of the files in the current folder and run them. Tests are identified by starting a function with the word Test and taking one argument of type *testing.T. In our case since we're testing the Average function we name the test function TestAverage. Once we have the testing functionsetup we
GETTING STARTED
CONCURRENCY
Goroutines. A goroutine is a function that is capable of running concurrently with other functions. To create a goroutine we use the keyword go followed by a function invocation: package main import "fmt" func f (n int) { for i := 0; i < 10; i++ { fmt.Println (n, ":",i) } } func main ()
FUNCTIONS — AN INTRODUCTION TO PROGRAMMING IN GO VARIABLES — AN INTRODUCTION TO PROGRAMMING IN GO Variables in Go are created by first using the var keyword, then specifying the variable name ( x ), the type ( string) and finally assigning a value to the variable ( Hello World ). The last step is optional so an alternative way of writing the program would be likethis:
STRUCTS AND INTERFACESGOLANG-BOOK.COM
An Introduction to Programming in Go A short, concise introduction to computer programming using the language Go. Designed by Google, Go is a general purpose programming language with modern features, clean syntax and a robust well-documented common library, making it an ideal language to learn as your first programming language. AN INTRODUCTION TO PROGRAMMING IN GO Packages. Go was designed to be a language that encourages good software engineering practices. An important part of high quality software is code reuse – embodied in the principle “Don't Repeat Yourself.”. As we saw in chapter 7 functions are the first layer we turn to allow code reuse. Go also provides another mechanism for codereuse
GETTING STARTED
Getting Started. Computer programming is the art, craft and science of writing programs which define how computers operate. This book will teach you how to write computer programs using a programming language designed by Google named Go. AN INTRODUCTION TO WEB DEVELOPMENT IN GO Go is a compiled programming language. The Go compiler takes source code and translates it into the native language the computer speaks (machine code). Go programs are broken up into packages, with a package called main being the entry point for a program. In AN INTRODUCTION TO WEB DEVELOPMENT IN GO © 2021 Caleb Doxsey. All Rights Reserved. Portions of this page may contain modifications based on work created and shared by Google and used according to termsYOUR FIRST PROGRAM
Your First Program. Traditionally the first program you write in any programming language is called a “Hello World” program – a program that simply outputs Hello World to your terminal. Let's write one using Go. First create a new folder where we can store ourprogram. Create
AN INTRODUCTION TO WEB DEVELOPMENT IN GO A variable is like a box: The assignment statement x = "Hello World" is how we put a value in the box and when we want to retrieve the value out of the box, we just use its name. There are many different ways to create variables in go. The grammar states: VarDecl = "var" ( VarSpec | " (" { VarSpec ";" } ")" ) . AN INTRODUCTION TO WEB DEVELOPMENT IN GO Introduction. This book will teach you the basics of server-side web development with Go and the Google App Engine platform. Although web deveopment is not particularly difficult when compared to other types of software development, it can be challenging due to the sheer number of technologies involved. BOOTCAMP | GO RESOURCES Part 1 (no content) Part 2: Introduction, Machine Setup; Part 3: Background and Hello World; Part 4: Go Commands and Hello World; Part 5: Documentation, Variables VARIABLES — AN INTRODUCTION TO PROGRAMMING IN GO Variables in Go are created by first using the var keyword, then specifying the variable name ( x ), the type ( string) and finally assigning a value to the variable ( Hello World ). The last step is optional so an alternative way of writing the program would be likethis:
GOLANG-BOOK.COM
An Introduction to Programming in Go A short, concise introduction to computer programming using the language Go. Designed by Google, Go is a general purpose programming language with modern features, clean syntax and a robust well-documented common library, making it an ideal language to learn as your first programming language. AN INTRODUCTION TO PROGRAMMING IN GO Packages. Go was designed to be a language that encourages good software engineering practices. An important part of high quality software is code reuse – embodied in the principle “Don't RepeatYourself.”
AN INTRODUCTION TO PROGRAMMING IN GO Pointers. When we call a function that takes an argument, that argument is copied to the function: func zero(x int) { x = 0 } func main() { x := 5 zero(x) fmt.Println(x) // x is still 5 } AN INTRODUCTION TO PROGRAMMING IN GO © 2021 Caleb Doxsey. Cover Art: © 2012 Abigail Doxsey Anderson. All Rights Reserved. Portions of this page may contain modifications basedon work created and
TESTING — AN INTRODUCTION TO PROGRAMMING IN GO Testing. Programming is not easy; even the best programmers are incapable of writing programs that work exactly as intended every time. Therefore an important part ofGETTING STARTED
CONCURRENCY
Concurrency. Large programs are often made up of many smaller sub-programs. For example a web server handles requests made from web browsers and serves up HTML web pages in response. AN INTRODUCTION TO WEB DEVELOPMENT IN GOYOUR FIRST PROGRAM
Your First Program. Traditionally the first program you write in any programming language is called a “Hello World” program – a program that simply outputs Hello World to VARIABLES — AN INTRODUCTION TO PROGRAMMING IN GO Variables. Up until now we have only seen programs that use literal values (numbers, strings, etc.) but such programs aren't particularlyuseful.
GOLANG-BOOK.COM
An Introduction to Programming in Go A short, concise introduction to computer programming using the language Go. Designed by Google, Go is a general purpose programming language with modern features, clean syntax and a robust well-documented common library, making it an ideal language to learn as your first programming language. AN INTRODUCTION TO PROGRAMMING IN GO The * and & operators. In Go a pointer is represented using the * (asterisk) character followed by the type of the stored value. In the zero function xPtr is a pointer to an int. * is also used to “dereference” pointer variables. Dereferencing a pointer gives us access to the value the AN INTRODUCTION TO PROGRAMMING IN GO Packages. Go was designed to be a language that encourages good software engineering practices. An important part of high quality software is code reuse – embodied in the principle “Don't Repeat Yourself.”. As we saw in chapter 7 functions are the first layer we turn to allow code reuse. Go also provides another mechanism for codereuse
AN INTRODUCTION TO PROGRAMMING IN GO © 2021 Caleb Doxsey. Cover Art: © 2012 Abigail Doxsey Anderson. All Rights Reserved. Portions of this page may contain modifications basedon work created and
TESTING — AN INTRODUCTION TO PROGRAMMING IN GO The go test command will look for any tests in any of the files in the current folder and run them. Tests are identified by starting a function with the word Test and taking one argument of type *testing.T. In our case since we're testing the Average function we name the test function TestAverage. Once we have the testing functionsetup we
GETTING STARTED
CONCURRENCY
Goroutines. A goroutine is a function that is capable of running concurrently with other functions. To create a goroutine we use the keyword go followed by a function invocation: package main import "fmt" func f (n int) { for i := 0; i < 10; i++ { fmt.Println (n, ":",i) } } func main ()
AN INTRODUCTION TO WEB DEVELOPMENT IN GO FUNCTIONS — AN INTRODUCTION TO PROGRAMMING IN GO VARIABLES — AN INTRODUCTION TO PROGRAMMING IN GO Variables in Go are created by first using the var keyword, then specifying the variable name ( x ), the type ( string) and finally assigning a value to the variable ( Hello World ). The last step is optional so an alternative way of writing the program would be likethis:
GOLANG-BOOK.COM
An Introduction to Programming in Go A short, concise introduction to computer programming using the language Go. Designed by Google, Go is a general purpose programming language with modern features, clean syntax and a robust well-documented common library, making it an ideal language to learn as your first programming language.GETTING STARTED
Getting Started. Computer programming is the art, craft and science of writing programs which define how computers operate. This book will teach you how to write computer programs using a programming language designed by Google named Go. AN INTRODUCTION TO WEB DEVELOPMENT IN GO Go is a compiled programming language. The Go compiler takes source code and translates it into the native language the computer speaks (machine code). Go programs are broken up into packages, with a package called main being the entry point for a program. InYOUR FIRST PROGRAM
Your First Program. Traditionally the first program you write in any programming language is called a “Hello World” program – a program that simply outputs Hello World to your terminal. Let's write one using Go. First create a new folder where we can store ourprogram. Create
AN INTRODUCTION TO WEB DEVELOPMENT IN GO © 2021 Caleb Doxsey. All Rights Reserved. Portions of this page may contain modifications based on work created and shared by Google and used according to terms AN INTRODUCTION TO WEB DEVELOPMENT IN GO A variable is like a box: The assignment statement x = "Hello World" is how we put a value in the box and when we want to retrieve the value out of the box, we just use its name. There are many different ways to create variables in go. The grammar states: VarDecl = "var" ( VarSpec | " (" { VarSpec ";" } ")" ) . AN INTRODUCTION TO WEB DEVELOPMENT IN GO Introduction. This book will teach you the basics of server-side web development with Go and the Google App Engine platform. Although web deveopment is not particularly difficult when compared to other types of software development, it can be challenging due to the sheer number of technologies involved. AN INTRODUCTION TO WEB DEVELOPMENT IN GO Variables are an abstract concept which the Go compiler understands and translates into something a computer can actually use. A computer is very complex, but its basic architecture - the Von Neumann architecture - involves 3 components: A central processing unit (CPU) which actually performs the instructions generated by the Go compiler. NEXT STEPS — AN INTRODUCTION TO PROGRAMMING IN GO Next Steps. We now have all the information we need to write most Go programs. But it would be dangerous to conclude that therefore we are competent programmers. Programming is as much a craft as it is just having knowledge. This chapter will provide you with some suggestions about how best to master the craft of programming. BOOTCAMP | GO RESOURCES Part 1 (no content) Part 2: Introduction, Machine Setup; Part 3: Background and Hello World; Part 4: Go Commands and Hello World; Part 5: Documentation, VariablesGO RESOURCES
BOOKS
* An Introduction to Programming in Go A short, concise introduction to computer programming using the language Go. Designed by Google, Go is a general purpose programming language with modern features, clean syntax and a robust well-documented common library, making it an ideal language to learn as your first programming language.* Introducing Go
Perfect for beginners familiar with programming basics, this hands-on guide provides an easy introduction to Go, the general-purpose programming language from Google. Author Caleb Doxsey covers the language’s core features with step-by-step instructions and exercises in each chapter to help you practice what you learn.GUIDES
* Machine Setup
* Windows
* OSX
* Go Concurrency from the Ground Up * Learn about Go's concurrency features by implementing them in another programming language.* Bootcamp
* A 4-week instructional series that covers the material in _An Introduction to Programming in Go_ as well as the basics of server-side web development and Google App Engine. © 2020 Caleb Doxsey. Cover Art: © 2012 Abigail Doxsey Anderson. AllRights Reserved.
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