You cannot select more than 25 topics
Topics must start with a letter or number, can include dashes ('-') and can be up to 35 characters long.
72 lines
1.5 KiB
Markdown
72 lines
1.5 KiB
Markdown
5 years ago
|
# last-line-stream
|
||
|
|
|
||
|
|
> A PassThrough stream that keeps track of last line written.
|
||
|
|
|
||
|
|
[](https://travis-ci.org/jamestalmage/last-line-stream) [](https://coveralls.io/github/jamestalmage/last-line-stream?branch=master)
|
||
|
|
|
||
|
|
|
||
|
|
## Install
|
||
|
|
|
||
|
|
```
|
||
|
|
$ npm install --save last-line-stream
|
||
|
|
```
|
||
|
|
|
||
|
|
|
||
|
|
## Usage
|
||
|
|
|
||
|
|
```js
|
||
|
|
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.
|
||
|
|
|
||
|
|
```js
|
||
|
|
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](http://github.com/jamestalmage)
|