TOC: Golang

• Introduction to Golang
  1. Features
  2. Why Golang?
  3. Go Designed by
  4. Open Souce
  5. Platforms
  6. Major Open Source Projects
  7. Install Golang
  8. Show Installed Version of Golang
  9. Editor/IDE for Golang
  10. Hello World
  11. Build Hello World exe
  12. Source of examples
  13. Separate directories! - main redeclared in this block
  14. Exercise: Hello World
• Basics
  1. Hello Foo - Println
  2. Hello Bar - Printf
  3. Hello Bar - Printf %v
  4. Enforce variables types
  5. Basic Types
  6. Show inferred variable type - Printf %T
  7. Show type of variable - reflect.TypeOf
  8. get variable type - %T or reflect.TypeOf
  9. Variable declaration (var)
  10. Default values of variables
  11. Scan input strings from STDIN
  12. if else statement
  13. Converting string to integer - strconv, Atoi
  14. Error Handling
  15. Converting string to integer with error handling - strconv, Itoa
  16. Converting string to float - strconv, ParseFloat
  17. Converting integer to string - strconv, Itoa
  18. Scan STDIN convert to number
  19. Comments
  20. Exercise: circle STDIN
  21. Exercise: rectangular STDIN
  22. Exercise: calculator STDIN
  23. Solution: circle STDIN
  24. Solution: circle STDIN with math
  25. Solution: rectangular STDIN
  26. Solution: calculator STDIN
  27. Solution: calculator STDIN switch
• CLI
  1. Args - (argv) command line arguments
  2. Exit early with exit code
  3. Exercise: rectangular
  4. Exercise: calculator
  5. Solution: rectangular CLI
  6. TODO: Solution: calculator CLI
  7. TODO: Solution: calculator (switch)
• Skeleton
  1. empty file
  2. Only package main
  3. Other package name
  4. Skeleton file
• Numbers
  1. Integer-based operations
  2. Floating-point based operations
  3. Precision
  4. Mixed operations
  5. int8
  6. uint8
  7. Bytes
  8. Byte is uint8
  9. uint16
  10. uint32
  11. Converting values to other types - float32, int, string
  12. Complex numbers
  13. binary - octal - hex
  14. Random
  15. Random with seed
  16. Exercise: One-dimensional spacefight - level 1
  17. Solution: One-dimensiona spacefight - level 1
• Boolean - Logical operators
  1. Boolean values - bool, true, false
  2. Boolean truth table
• Loops
  1. 3-part for loop
  2. while-like for loop
  3. infinite loop
  4. break out from loop
  5. continue
  6. loop on two variables
  7. break out from internal loop (labels)
  8. Exercise: One-dimensional spacefight
  9. Exercise: FizzBuzz
  10. Solution: One-dimensional spacefight - multiple guesses till hit
  11. Solution: One-dimensional spacefight - allow x
  12. Solution: One-dimensional spacefight - allow m
  13. Solution: FizzBuzz
• Strings
  1. Single and double quotes
  2. Runes
  3. Strings
  4. Change string
  5. Strings and Runes
  6. Length of string
  7. iterate over characters in a string
  8. String Contains, HasPrefix, HasSuffix
  9. Split
  10. Join
  11. Split on whitespaces
  12. Newlines
  13. Read line from stdin (keyboard)
  14. Read line from stdin (keyboard) with error handling
  15. Trim line - remove trailing newline from string
  16. Strings and bytes
  17. Scan in a loop
  18. Compare strings
  19. Raw strings
  20. Multiline strings
  21. Exercise: how long is this string?
  22. Exercise: which string is longer?
  23. Exercise: which string is ahead in ABC?
  24. Exercise: which string is ahead - menu
  25. Exercise: Hide substring
  26. Solution: how long is this string?
  27. Solution: which string is longer?
  28. Solution: which string is ahead in ABC?
  29. Solution: which string is ahead - menu
  30. Solution: Hide substring
• Arrays
  1. Arrays
  2. Array index out of range - compile time
  3. Array index out of range - run time
  4. Array change value
  5. Arrays automatic length
  6. Array: empty and fill
  7. Empty array of strings
  8. Array assignment (copy)
  9. Array assignment (pointer)
  10. Matrix (two dimensional array)
  11. For loop on array - iterate over array
  12. for loop on values of array (no index)
  13. Arrays conclusion
  14. Exercise: Language Selector
  15. Exercise: count digits
  16. Exercise: count digits from string
  17. Exercise: Report statistics
  18. Solution: Language Selector
  19. Solution: count digits
  20. Solution: count digits from string
  21. Solution: Report statistics
• Variables
  1. Variable Declarations
  2. Variables - Naming
  3. Declare multiple variables in one line
  4. Variables cannot be redefined (no new variables on left side of :=)
  5. At least one new variable on the left side of :=
  6. Use the same err on the left hand side
  7. Package variable
  8. Shadowing package variable
  9. Variable scope
• Constants
  1. Constants
  2. Constants cannot be changed
  3. Shadowing constants
  4. Constant blocks
  5. iota
  6. iota skipping 0
  7. const powers of 2
• Functions
  1. Hello World function
  2. Hello You function (passing parameter)
  3. Function with multiple parameters
  4. Function with return value
  5. Multiple return values
  6. Returning an error from a functions
  7. Named return parameters
  8. Passing a function as a parameter - Callback function
  9. Callback function with one parameter
  10. Anonymous functions
  11. Anonymous functions assigned to name
  12. Numbers are passed by value
  13. Function Overloading - Multiple function with the same name
  14. Defer
  15. Defer early returns
  16. Deferred cd in a function
  17. Defer in if-statements
  18. Defer and parameters
  19. Exercise: Fibonacci
  20. Exercise: Defer remove temporary directory
  21. Exercise: FizzBuzz in function
  22. Exercise: ROT13
  23. Solution: FizzBuzz in function
  24. Solution: ROT13
• Slices
  1. Slice of an array
  2. Slice
  3. Change value in slice
  4. Slice Assign
  5. Slice of a slice
  6. Append to a slice
  7. Slice append
  8. Remove last element of slice (pop)
  9. Remove first element of slice (shift, pop(0))
  10. Pre-allocate capacity for slice with make
  11. For loop in slice - iterate over slice
  12. for loop on values of slice (no index)
  13. Merge two slices
  14. Find element in array or slice
  15. Remove element of slice
  16. Weird merge slices
  17. Sort slice
  18. Are values sorted?
  19. Sort strings by length
  20. Sort strings by length and then abc order
  21. Search in slice
  22. Variadic function (arbitrary number of parameters)
  23. Defer and slice
  24. Exercise: count words
  25. Exercise: Create a list of words from sentences
  26. Exercise: Create a unique list of values
  27. Exercise: Reverse Polish Calculator
  28. Exercise: DNA Sequencing
  29. Solution: count words
  30. Solution: Create a list of words from sentences
  31. Solution: Create a unique list of values
  32. Solution: Reverse Polish Calculator
  33. Solution: DNA Sequencing
  34. Solution: DNA Sequencing with in place filter
• Files
  1. Read file line-by-line with Scanner
  2. Read file line by line with Reader
  3. Read file as one string (slurp)
  4. Write to file
  5. Write number to file
  6. Append to file
  7. Reading CSV file
  8. Exercise: Sum of numbers in a file
  9. Exercise: Count number of digitis
  10. Exercise: ROT13 on file
  11. Exercise: Selector with list of items from a file
  12. TODO: Solution: Sum of numbers in a file
• Maps
  1. Map (hash, dictionary)
  2. Empty Map
  3. Empty Map with make
  4. Map type defintion without container
  5. Create map with data in it already
  6. Delete Map element
  7. Size of map (len)
  8. Access map element (that does not exist)
  9. Map element exists
  10. Increment map elements
  11. Iterate over elements of map
  12. Keys of a map
  13. Sort map
  14. Sort map by value
  15. map of slices
  16. Mixed map
  17. Exercise: count characters
  18. Exercise: count characters - sort by frequency
  19. Exercise: count words
  20. Exercise: count words from file
  21. Solution: count characters
  22. Solution: count characters - sort by frequency
  23. Solution: count words
  24. Solution: count words from file
• Testing
  1. Testing in Go
  2. Testing modules
  3. Simple example with testing
  4. Test with failure
  5. Run selected test functions
  6. Exercise: Test Anagram
  7. Exercise: Test Calculator
  8. Exercise: statistics
  9. Solution: Test Anagram
  10. Solution: Test Calculator
  11. Solution: statistics
• Struct
  1. Struct and type
  2. Struct with partial information (default values)
  3. Slice of structs
  4. Anonymous struct
  5. Struct in a struct
  6. composition via embedding instead of inheritance
  7. Tags and introspection (reflect)
  8. use cleanenv
  9. methods
  10. method of int
  11. map keys method
  12. method gets copy of struct
  13. method pass pointer of struct
  14. Exercise: read-csv-struct
  15. Exercise: implement 2D point and move
  16. Exercise: implement 3D point and move
  17. Exercise: implement wc
  18. Solution: implement wc
• Logging
  1. Simple Logging
  2. Logging Fatal errors
  3. Logging to a file - rewrite
  4. Logging to a file - append
  5. Logging the filename
  6. Logging flags
  7. Logging: Set Prefix
  8. Turn logging on/off
  9. TODO: log levels?
  10. TODO: log function names
  11. TODO: logrotation
• Time
  1. Monolitic vs Wallclock time
  2. Time example
  3. Nanoseconds
  4. sleep and elapsed time
  5. Time format
  6. Date Arithmetic
• Pointers
  1. Integer assignment is copying (not pointer)
  2. Pointer to integer
  3. Array Pointer
  4. Slice Pointer and copy slice
• Panic (Exception handling)
  1. Panic
  2. We Panic
  3. Turn error into panic when port is used
  4. Panic after defer
  5. Recover (and re-panic)
  6. Recover from deep panic
  7. Convert panic to returned error
  8. Exercise: read several files
  9. Solution: read several files
• Goroutine
  1. Without goroutine
  2. goroutine example
  3. goroutine not finished yet
  4. goroutine no wait
  5. Global waitgroup for goroutines
  6. Wait for goroutines
  7. Return data from goroutines
  8. Counter - shared variable
  9. Mutex
  10. Channels
  11. Channels are blocking
  12. Channel capacity - buffered channel
  13. Channel with loop
  14. Pipeline map
  15. Pipeline filter
  16. TODO: Pipelines
  17. Fibonacci goroutine
  18. Loop from a channel
  19. Select channel
  20. Delayed start
  21. Job pool
  22. Check for race conditions
  23. Stand alone web application
  24. Maximum processes
  25. Exercise: Collect data from urls
  26. Exercise: Process multiple CSV files
  27. Exercise: counter with lock
  28. Exercise: Fibonacci in parallel
  29. Solution: Collect data from urls
• Functions 2
  1. Numbers passed by reference
  2. Array passed by value or by reference
  3. TODO: pass by value, pass by reference
  4. Variable declaration outside of functions
  5. Exercise: Fibonacci series
  6. Exercise: Permutations
  7. Exercise: 100 doors
  8. Solution: Fibonacci series
  9. Solution: Fibonacci recursive
  10. Solution: single counter
  11. Solution: Permutations
  12. Solution: 100 doors
  13. TODO return array
• Bitwise
  1. bitwise operators
  2. bitwise left shift
  3. bitwise not
  4. bitwise clear bit - AND NOT
• Formatting
  1. Println
  2. Sprintln
  3. Sprintf
  4. Padding and alignment
• Filesystem
  1. os.stat information about a file or directory (file exists)
  2. List Directory
  3. Get Current Working Directory (cwd)
  4. Create Temporary Directory
  5. Traverse directory tree
  6. Join parts of a directory or filepath
• Regular Expressions (Regexes, Regexp)
  1. Regexp
  2. Regexp
  3. Regex nomatch
  4. Regex Markua include
  5. Exercise: Parse ini file
  6. Exercise: parse hours log file and give report
  7. Solution: Parse ini file
  8. Solution: parse hours log file and give report
• Flow Control
  1. if-statements
  2. if, else, else if
  3. if with initializer
  4. Comparision Operators
  5. Short circuit
  6. switch
  7. type switch
• JSON
  1. JSON round trip
• Web client
  1. http get request
  2. URL parsing
  3. TODO Checking links of a web site
  4. TODO fteching youtube playlist
  5. HTTP GET failure
• HTTP Server
  1. HTTP Hello World
  2. HTTP Echo GET
  3. HTTP Echo POST
  4. text/template
  5. text/template with map
  6. text/template with struct
  7. text/template in file
  8. text/template if
  9. text/template loop
  10. html/template
  11. HTTP Hello World templates
• External programs
  1. Find executable (which where)
  2. Run external programs
  3. Run external program in the background
  4. Capture the outout of an external program
• Distribution
  1. Corss Compilation
  2. Packages
  3. Cross compile
  4. Environment variables
  5. Install packages
  6. Include and distribute external files
  7. go workspace layout
  8. Directory of 3rd party packages
  9. Semantic versioning
  10. go install
• Command line arguments (Flag)
  1. Flag
  2. Flags as pointers
  3. Flags as variables
• Appendix
  1. Some advanced topics
  2. Resources
  3. Caller filename
  4. os.Executable
  5. Solution: rectangular (STDIN) Reader
  6. Scan int
  7. Function assignment
  8. Overwriting built-in functions
  9. TODO: stack
  10. queue
  11. Left over
  12. Open Web browser
  13. Unicode
  14. golang create io.reader from string
  15. Parse HTML Token by token
  16. Parse HTML extract tags and attributes
• Other slides
  1. Print to STDERR or STDOUT
  2. Companies using Golang in Israel