# gotb

**Repository Path**: mirrors_karrick/gotb

## Basic Information

- **Project Name**: gotb
- **Description**: Go library that implements a few tail buffer abstract data types.
- **Primary Language**: Unknown
- **License**: MIT
- **Default Branch**: master
- **Homepage**: None
- **GVP Project**: No

## Statistics

- **Stars**: 0
- **Forks**: 0
- **Created**: 2020-08-09
- **Last Updated**: 2026-03-21

## Categories & Tags

**Categories**: Uncategorized

**Tags**: None

## 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
}
```