// Copyright 2013 The Go Authors. All rights reserved. // Use of this source code is governed by a BSD-style // license that can be found in the LICENSE file. package log_test import ( "bytes" "fmt" "log" ) func ExampleLogger() { var ( buf bytes.Buffer logger = log.New(&buf, "logger: ", log.Lshortfile) ) logger.Print("Hello, log file!") fmt.Print(&buf) // Output: // logger: example_test.go:19: Hello, log file! } func ExampleLogger_Output() { var ( buf bytes.Buffer logger = log.New(&buf, "INFO: ", log.Lshortfile) infof = func(info string) { logger.Output(2, info) } ) infof("Hello world") fmt.Print(&buf) // Output: // INFO: example_test.go:36: Hello world }