Job Ready Go

enter Cover Table of Contents Title Page Introduction WHAT DOES THIS BOOK COVER? READER SUPPORT FOR THIS BOOK PART I: The Basics of the Go Programming Language Lesson 1: Getting Started with Go INSTALLING GO TESTING THE INSTALLATION CREATING A HELLO, WORLD! PROGRAM MULTIPLE VERSIONS OF GO ONLINE EDITOR FOR GO: THE GO PLAYGROUND SUMMARY EXERCISES Lesson 2: Understanding Go Basics UNDERSTANDING STATEMENTS AND TOKENS STATEMENTS COMMENTS IDENTIFIERS KEYWORDS SUMMARY EXERCISES Lesson 3: Storing with Variables VARIABLES STATIC VS. DYNAMIC TYPE DECLARATION VARIABLE SCOPE OBTAINING USER INPUT CONVERTING A STRING TO A NUMBER NUMERIC DATA TYPES SUMMARY EXERCISES Lesson 4: Performing Operations ARITHMETIC OPERATIONS ASSIGNMENT OPERATIONS WORKING WITH BOOLEANS RELATIONAL OPERATIONS BOOLEAN OPERATIONS MATH FUNCTIONS BITWISE OPERATIONS RANDOM NUMBERS SUMMARY EXERCISES Lesson 5: Controlling Program Flow with Conditional Statements CONDITIONAL STATEMENTS USING AN IF STATEMENT WORKING WITH MULTIPLE CONDITIONS USING AN IF-ELSE STATEMENT CREATING NESTED IF STATEMENTS USING A SWITCH STATEMENT SUMMARY EXERCISES Lesson 6: Controlling Program Flow with Loops LOOPING STATEMENTS FOR LOOPS LOOPING THROUGH A STRING THE RANGE FUNCTION LOOP CONTROL STATEMENTS SUMMARY EXERCISES Lesson 7: Pulling It All Together: Income Tax Calculator GETTING STARTED STEP 1: GATHER REQUIREMENTS STEP 2: DESIGN THE PROGRAM STEP 3: CREATE THE INPUTS STEP 4: CALCULATE THE TAXABLE INCOME STEP 5: CALCULATE THE TAX RATE STEP 6: UPDATE THE APPLICATION STEP 7: ADDRESS THE UI ON YOUR OWN SUMMARY PART II: Organizing Code and Data in Go Lesson 8: Using Functions DEFINING A FUNCTION VARIADIC FUNCTIONS RECURSION FUNCTION AS A VALUE CLOSURES SUMMARY EXERCISES Lesson 9: Accessing Arrays DECLARING AN ARRAY DECLARING AND INITIALIZING AN ARRAY INFERRING ARRAY SIZE USING A FOR LOOP TO DEFINE AN ARRAY USING RANGE WITH AN ARRAY CREATING MULTIDIMENSIONAL ARRAYS DUPLICATING AN ARRAY COMPARING ARRAYS SUMMARY EXERCISES Lesson 10: Working with Pointers CREATING A POINTER ACCESSING THE STORED VALUE OF A POINTER UNDERSTANDING NIL POINTERS USING POINTERS TO CHANGE VARIABLES COMPARING POINTERS WORKING WITH AN ARRAY OF POINTERS USING POINTERS WITH FUNCTIONS SUMMARY EXERCISES Lesson 11: Organizing with Structs DECLARING AND INITIALIZING A STRUCT USING KEY-VALUE PAIRS WITH STRUCTS USING THE NEW KEYWORD POINTERS AND STRUCTS NESTED STRUCTS ADDING METHODS TO A STRUCT TYPE AND VALUE COMPARING STRUCTS SUMMARY EXERCISES Lesson 12: Accessing Slices HOW SLICES WORK SLICE AN ARRAY CHANGING THE SIZE OF A SLICE ITERATING THROUGH A SLICE THE MAKE FUNCTION CREATING A SLICE VARIABLE WITH VAR WORKING WITH SLICE ELEMENTS APPENDING TO A SLICE USING THE APPEND FUNCTION COPYING A SLICE CREATING A SLICE USING THE NEW KEYWORD REMOVING AN ITEM FROM A SLICE SUMMARY EXERCISES Lesson 13: Manipulating Maps DEFINING A MAP EMPTY MAPS CREATING A MAP USING MAKE MAP LENGTH RETRIEVING MAP ELEMENTS CHECKING FOR A KEY ITERATING THROUGH A MAP DELETING MAP ELEMENTS LITERAL DECLARATIONS IN MAPS SUMMARY EXERCISES Lesson 14: Creating Methods WORKING WITH METHODS DEFINING A METHOD USING POINTERS WITH METHODS NAMING METHODS WORKING WITH VALUE RECEIVERS AND ARGUMENTS WORKING WITH POINTER RECEIVERS AND ARGUMENTS SUMMARY EXERCISES Lesson 15: Adding Interfaces CREATING AN INTERFACE INTERFACES AND CODE REUSABILITY STATIC VS. DYNAMIC INTERFACE TYPES EMPTY INTERFACES CHECKING AN INTERFACE TYPE MULTIPLE INTERFACES EMBEDDED INTERFACES SUMMARY EXERCISES Lesson 16: Pulling It All Together: Building a Burger Shop REQUIREMENTS FOR OUR APPLICATION PLANNING THE CODE CREATING THE STRUCTS CREATING THE HELPER FUNCTIONS TYING THE CODE TOGETHER SUMMARY THE FULL BURGER SHOP LISTING PART III: Creating Job Ready Solutions in Go Lesson 17: Handling Errors ERRORS IN GO PROGRAMS THE GO ERROR TYPE CUSTOM ERROR HANDLING ERROR METHODS ERRORF BLANK IDENTIFIERS ERROR MESSAGES WITH STRUCTS MULTIPLE CUSTOM ERROR MESSAGES SUMMARY EXERCISES Lesson 18: Concurrency USING CONCURRENCY PARALLELISM USING GOROUTINES MULTIPLE GOROUTINES WORKING WITH CHANNELS CHANNELS WITH MULTIPLE GOROUTINES CLOSING CHANNELS ITERATING THROUGH A CHANNEL SUMMARY EXERCISES Lesson 19: Sorting and Data Processing SORTING TIME AND DATE OPERATIONS REGULAR EXPRESSIONS SUMMARY EXERCISES Lesson 20: File I/O and OS Operations READING A FILE WRITING TO A FILE WORKING WITH DIRECTORIES COMMAND-LINE ARGUMENTS SUMMARY EXERCISES Lesson 21: Pulling It All Together: Word Analysis in Go EXAMINING THE DATA READING THE REVIEW DATA TOKENIZING AN INPUT STRING CREATING A TOKENIZE FUNCTION COUNTING THE WORDS IN EACH REVIEW TOKENIZING AND COUNTING THE REVIEWS DESIGNING IMPROVEMENTS POSSIBLE FURTHER IMPROVEMENTS FINAL CODE LISTING SUMMARY PART IV: Advanced Topics for Go Development Lesson 22: Testing TEST-DRIVEN DEVELOPMENT TESTING LEVELS THE TDD WORKFLOW THE TESTING PACKAGE TUTORIAL: TEST-DRIVEN DEVELOPMENT BEHAVIOR-DRIVEN DEVELOPMENT SUMMARY EXERCISES Lesson 23: API Development Tutorial OVERVIEW AND REQUIREMENTS STEP 1: CREATE THE DATASET AND A SIMPLE API STEP 2: ADD A ROUTER: GORILLA MUX STEP 3: RETRIEVE A RECORD STEP 4: ADD A NEW RECORD STEP 5: DELETE A RECORD SUMMARY EXERCISES Lesson 24: Working with gRPC WORKING WITH gRPC SETTING UP THE SERVICES CREATING A SERVER CREATING A gRPC SERVER CREATING THE CHAT SERVICE UPDATING THE SERVER CODE TO INCLUDE THE CHAT SERVICE CREATING THE CHAT PACKAGE CREATING A CLIENT RUNNING THE SERVER AND THE CLIENT SUMMARY EXERCISES Lesson 25: Pulling It All Together: Using Smart Data PROJECT OVERVIEW DESIGNING OUR API IMPLEMENTING THE gRPC SERVER CREATING THE API SUMMARY Lesson 26: Using Modules GETTING STARTED WITH MODULES STEP 1: CREATE THE PROJECT DIRECTORY STEP 2: CREATE YOUR PROGRAM(S) STEP 3: CREATE A TEST PROGRAM STEP 4: CREATE THE GO.MOD FILE STEP 5: TEST THE MODULE STEP 6: USING THE MODULE NAMING MODULE FUNCTIONS SUMMARY EXERCISES Appendix: File Permissions and Access Rights CHANGING OTHER USER ACCESS RIGHTS IN LINUX DIGITAL REPRESENTATION FOR PERMISSIONS Index Copyright About the Authors About the Technical Writer About the Technical Editor Acknowledgments End User License Agreement