dariodip · March 30, 2021 20:50 · Mar 30, 2021 · Mar 28, 2021 · Mar 28, 2021 · Mar 28, 2021
diff --git a/complex_structure_encode.go b/complex_structure_encode.go
@@ -5,6 +5,7 @@ func encode(complexStructures []ComplexStruct) {
 	if err := encoder.Encode(&complexStructures); err != nil {
 		panic(err)
 	}
+	// this is just an example! never write a file inside a function that way
 	if err := os.WriteFile("complex_structures.gob", buf.Bytes(), os.ModePerm); err != nil {
 		panic(err)
 	}

diff --git a/complex_structure.go b/complex_structure.go
@@ -0,0 +1,35 @@
+import (
+	"crypto/md5"
+	"crypto/sha256"
+	"fmt"
+	"io"
+)
+
+// ComplexStruct stores a value and its MD5 and SHA256 ingests
+type ComplexStruct struct {
+	Value        string
+	MD5Ingest    []byte
+	SHA256Ingest []byte
+}
+
+func NewComplexStruct(v string) ComplexStruct {
+	md5h := md5.New()
+	io.WriteString(md5h, v)
+
+	sha256h := sha256.New()
+	io.WriteString(sha256h, v)
+
+	return ComplexStruct{
+		Value:        v,
+		MD5Ingest:    md5h.Sum(nil),
+		SHA256Ingest: sha256h.Sum(nil),
+	}
+}
+
+func (cs ComplexStruct) String() string {
+	return fmt.Sprintf("v=%s,md5=%x,sha256=%x",
+		cs.Value,
+		cs.MD5Ingest,
+		cs.SHA256Ingest,
+	)
+}
diff --git a/complex_structure_decode.go b/complex_structure_decode.go
@@ -0,0 +1,17 @@
+
+//go:embed complex_structures.gob
+var embedCs []byte
+
+func main() {
+
+	var complexStructures []ComplexStruct
+
+	decoder := gob.NewDecoder(bytes.NewReader(embedCs))
+	if err := decoder.Decode(&complexStructures); err != nil {
+		panic(err)
+	}
+
+	for _, cs := range complexStructures {
+		fmt.Println(cs)
+	}
+}
diff --git a/complex_structure_encode.go b/complex_structure_encode.go
@@ -0,0 +1,11 @@
+func encode(complexStructures []ComplexStruct) {
+
+	var buf bytes.Buffer
+	encoder := gob.NewEncoder(&buf)
+	if err := encoder.Encode(&complexStructures); err != nil {
+		panic(err)
+	}
+	if err := os.WriteFile("complex_structures.gob", buf.Bytes(), os.ModePerm); err != nil {
+		panic(err)
+	}
+}
diff --git a/embed_all_files.go b/embed_all_files.go
@@ -0,0 +1,18 @@
+import (
+	"embed"
+	"fmt"
+	"io/ioutil"
+)
+
+//go:embed *
+var fs embed.FS
+
+func main() {
+	files, _ := fs.ReadDir(".")
+	for _, file := range files {
+		fmt.Println("File name: ", file.Name())
+		fileContent, _ := fs.Open(file.Name())
+		content, _ := ioutil.ReadAll(fileContent)
+		fmt.Println("File content:\n", string(content))
+	}
+}
diff --git a/hello_embedded_fs.go b/hello_embedded_fs.go
@@ -0,0 +1,12 @@
+import (
+	"embed"
+	"fmt"
+)
+
+//go:embed *
+var f embed.FS
+
+func main() {
+	data, _ := f.ReadFile("hello.txt")
+	fmt.Println(string(data))
+}
diff --git a/go_embedded_byte.go b/go_embedded_byte.go
@@ -0,0 +1,11 @@
+import (
+	_ "embed"
+	"fmt"
+)
+
+//go:embed hello.txt
+var hello []byte
+
+func main() {
+	fmt.Println(string(hello))
+}
diff --git a/hello.txt b/hello.txt
@@ -0,0 +1 @@
+Hello from embedded!
diff --git a/hello_embedded.go b/hello_embedded.go
@@ -0,0 +1,11 @@
+import (
+	_ "embed"
+	"fmt"
+)
+
+//go:embed hello.txt
+var hello string
+
+func main() {
+	fmt.Println(hello)
+}