Go Types

Introduction to type systems and Go at Startup Edmonton Hack Day (mostly live coding, but here are a few slides).

Transcript

1. Go Types Startup Edmonton Hack Day Saturday, May 9, 2015
2. Today ✴ Variables ✴ Declare, Initialize, Assign ✴ Strong and Static Typing ✴ Type Inference ✴ Scope ✴ Numeric Types
3. play.golang.org
4. Nathan Youngman @nathany ✓ JavaScript ✓ PHP ✓ Python ✓ Ruby ✓ C ✓ Java ✓ Go
5. Static types, strong types Weak Strong Dynamic JavaScript PHP Python
 Ruby Static C Java
 C# Go
6. play.golang.org package main
 
 import "fmt"
 
 func main() {
 var name string
 name = "Kim"
 fmt.Println("Hello", name)
 }
7. play.golang.org package main
 
 import "fmt"
 
 func main() {
 var a int
 a, b := 1, 2
 fmt.Println(a, b)
 }

8. play.golang.org package main
 
 import "fmt"
 
 func main() {
 a, op, b := 1, "+", 2
 
 var result int
 if op == "+" {
 result = a + b
 }
 fmt.Println(result)
 }
9. Numeric types Signed Minimum Maximum int8 -128 127 int16 -32768 32767 int32 -2147483648 2147483647 int64 -9223372036854775808 9223372036854775807 Unsigned Minimum Maximum uint8 0 255 uint16 0 65535 uint32 0 4294967295 uint64 0 18446744073709551615
10. Numeric types Floating point IEEE-754 ~ Minimum ~ Maximum float32 -1038 1038 float64 -10308 10308
11. Nathan Youngman @nathany speakerdeck.com/nathany