A few random notes from my initial attempts learning Golang.
Compile and run:
go run source.go
Build executable:
go build source.go
Structure:
//defines a module
package packagename
Package main defines a standalone executable:
package main
Import required packages:
import packagename
Semicolons are not required unless there’s more than one statement on a line
Functions:
func functionName() {
//code
{
Arguments passed to an app are accessible via the array os.Args. os.Args[0] contains the name of the app itself.
Ok, let’s try my first hello world in Eclipse with the Goclipse plugin installed:
import (
"fmt"
)
func main(){
fmt.Println("hello!")
}
I get this error:
Ok, first lesson, a package is required, so added:
package main
Creating a Run As… config in Eclipse for my project and then attempting to Run again gave me this useful message:
Ok, so I moved my source into an app folder (/src/main) but this gave me additional errors. At this point I’ve errors about $GOPATH:
Looking through the Project properties, this dialog with this option adds the Project location into the required GOPATH:
Now my first app runs successfully!
