Add log

env/env.go

@@ -0,0 +1,21 @@
+package env
+
+import (
+	"fmt"
+	"os"
+	"strings"
+)
+
+func Env() {
+	os.Setenv("GOBYEXAMPLE", "WORKS")
+	fmt.Println("$GOBYEXAMPLE=", os.Getenv("GOBYEXAMPLE"))
+	envGoRoot := os.Getenv("GOROOT")
+	fmt.Println("$GOROOT=", envGoRoot)
+
+	fmt.Println()
+	fmt.Println("All env vars:")
+	for _, envLine := range os.Environ() {
+		pair := strings.SplitN(envLine, "=", 2)
+		fmt.Printf("%s=%s\n", pair[0], pair[1])
+	}
+}

logging/logging.go

@@ -0,0 +1,42 @@
+package logging
+
+import (
+	"bytes"
+	"fmt"
+	"log"
+	"log/slog"
+	"os"
+)
+
+func Logging() {
+	log.Println("Baby's first log!")
+
+	log.SetFlags(log.LstdFlags | log.Lmicroseconds)
+	log.Println("Log with microseconds!")
+
+	log.SetFlags(log.LstdFlags | log.Lshortfile)
+	log.Println("Now with filename!")
+
+	mlog := log.New(os.Stdout, "[mlog] ", log.LstdFlags|log.Lshortfile)
+	mlog.Println("My own logger!")
+
+	mlog.SetPrefix("[mlog with SetPrefix] ")
+	mlog.Println("Changed prefix")
+
+	var logBuffer bytes.Buffer
+	buflog := log.New(&logBuffer, "[bytes] ", log.LstdFlags|log.Lshortfile)
+
+	buflog.Println("Writing to a bytes buffer")
+	buflog.Println("Writing more to the bytes buffer")
+
+	fmt.Println()
+	fmt.Println("Printing logs from bytes buffer below:")
+	fmt.Println(logBuffer.String())
+
+	jsonHandler := slog.NewJSONHandler(os.Stderr, nil)
+	jlog := slog.New(jsonHandler)
+	jlog.Info("First json log entry")
+	jlog.Info("kv args", "key1", 1, "key2", 2, "key3", true)
+	jlog.Warn("warning!!!")
+	jlog.Error("error!!!")
+}

main.go

@@ -43,7 +43,9 @@ import (
 	// "git.sangeeth.dev/gobyexample/tmp"
 	// "git.sangeeth.dev/gobyexample/embed"
 	// "git.sangeeth.dev/gobyexample/cli"
-	"git.sangeeth.dev/gobyexample/subcmd"
+	// "git.sangeeth.dev/gobyexample/subcmd"
+	// "git.sangeeth.dev/gobyexample/env"
+	"git.sangeeth.dev/gobyexample/logging"
 )
 
 func main() {
@@ -89,5 +91,7 @@ func main() {
 	// tmp.Tmp()
 	// embed.Embed()
 	// cli.Cli()
-	subcmd.SubCmd()
+	// subcmd.SubCmd()
+	// env.Env()
+	logging.Logging()
 }