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last-line-stream

v1.0.0

Published

A PassThrough stream that keeps track of last line written

Downloads

160,856

Readme

last-line-stream

A PassThrough stream that keeps track of last line written.

Build Status Coverage Status

Install

$ npm install --save last-line-stream

Usage

const lastLineStream = require('last-line-stream');

const stream = lastLineStream();

stream.write('foo');

assert(stream.lastLine === 'foo');

stream.write('bar');

assert(stream.lastLine === 'foobar');

stream.write('baz\nquz');

assert(stream.lastLine === 'quz');

API

lastLineStream([pipeTo])

Returns a new instance of the spying PassThrough stream,

pipeTo

Type: stream

If supplied, the new instance will automatically be piped to this stream.

stream.lastLine

Type: string

The last line written out to this stream. The lastLine value will grow until the stream sees a newline character ('\n').

Low Level API

A low-level non-stream based API is available. It has only two methods.

var createTracker = require('last-line-stream/tracker');
var tracker = createTracker();

// append some text.
tracker.update(someString);

// Find the complete last line of all the text appended.
tracker.lastLine();

License

MIT © James Talmage