Feat : add writer example

.gitignore

@@ -1,2 +1,3 @@
 bin/
 !bin/.gitkeep
+./notes.txt

go.mod

@@ -2,6 +2,6 @@ module antoine-roux.ml/projects/go/test
 
 go 1.15
 
-require github.com/docker/docker-credential-helpers v0.6.3 // indirect
+require github.com/docker/docker-credential-helpers v0.6.3
 
 replace antoine-roux.ml/projects/go/test/employee => ./employee

notes.txt

@@ -0,0 +1 @@
+hello world

writer.go

@@ -0,0 +1,33 @@
+package main
+
+import (
+	"io"
+	"log"
+	"os"
+)
+
+func main() {
+
+	err := WriteString("hello world")
+	if err != nil {
+		log.Fatalln(err)
+	}
+}
+
+func WriteString(str string) (err error) {
+	var f *os.File
+	f, err = os.Create("./notes.txt")
+	if err != nil {
+		return
+	}
+
+	defer func() {
+		cerr := f.Close()
+		if err == nil {
+			err = cerr
+		}
+	}()
+
+	_, err = io.WriteString(f, str)
+	return
+}