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The Way to Go

Solution Review: Writing to a WIKI Page

Explore how to define a struct with fields, write its data to a file, and read the file contents back into a struct in Go. This lesson covers using methods with struct pointers for saving and loading data, as well as basic error handling in file operations.

We'll cover the following...
Go (1.6.2)
package main
import (
	"fmt"
	"io/ioutil"
)
type Page struct {
	Title string
	Body  []byte
}
func (p *Page) save() error {
	filename := p.Title + ".txt"
	return ioutil.WriteFile(filename, p.Body, 0600)
}
func load(title string) (*Page, error) {
	filename := title + ".txt"
	body, err := ioutil.ReadFile(filename)
	if err != nil {
		return nil, err
	}
	return &Page{Title: title, Body: body}, nil
}
func main() {
	p1 := &Page{Title: "TestPage", Body: []byte("This is a sample Page.")}
	p1.save()
	p2, _ := load("TestPage")
	fmt.Println(string(p2.Body))
}

In the code above, we define a struct of type Page struct at line 7 with two fields: Title and Body.

Now, look at the header of the load method at line 17. It takes title, the filename as a parameter (apart from the ...