https://github.com/karrick/gotb

Go library that implements a few tail buffer abstract data types.
https://github.com/karrick/gotb

golang golang-library library text

Last synced: 16 days ago
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Go library that implements a few tail buffer abstract data types.

• Host: GitHub
• URL: https://github.com/karrick/gotb
• Owner: karrick
• License: mit
• Created: 2018-09-27T19:39:36.000Z (almost 8 years ago)
• Default Branch: master
• Last Pushed: 2018-09-27T19:44:59.000Z (almost 8 years ago)
• Last Synced: 2025-10-25T04:04:12.267Z (8 months ago)
• Topics: golang, golang-library, library, text
• Language: Go
• Homepage:
• Size: 3.91 KB
• Stars: 1
• Watchers: 1
• Forks: 0
• Open Issues: 0
• Metadata Files:
  • Readme: README.md
  • License: LICENSE

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README

          
# gotb

Implements a few tail buffer abstract data types.

## Description

Tail buffers are useful when a program needs to track the N final

elements added to a list, but not necessarily track previous elements.

```Go

// tail copies the final num lines from io.Reader to io.Writer.

func tail(num int, r io.Reader, w io.Writer) error {

	cb, err := gotb.NewStrings(num)

	if err != nil {

		return err

	}

	scanner := bufio.NewScanner(r)

	for scanner.Scan() {

		_, _ = cb.QueueDequeue(scanner.Text())

	}

	if err := scanner.Err(); err != nil {

		return err

	}

	for _, line := range cb.Drain() {

		if _, err = fmt.Fprintln(w, line); err != nil {

			return err

		}

	}

	return nil

}

```