mirror of
https://github.com/actions/setup-python.git
synced 2024-11-23 17:17:36 +00:00
55 lines
1.2 KiB
Markdown
55 lines
1.2 KiB
Markdown
# merge-stream
|
|
|
|
Merge (interleave) a bunch of streams.
|
|
|
|
[](http://travis-ci.org/grncdr/merge-stream)
|
|
|
|
## Synopsis
|
|
|
|
```javascript
|
|
var stream1 = new Stream();
|
|
var stream2 = new Stream();
|
|
|
|
var merged = mergeStream(stream1, stream2);
|
|
|
|
var stream3 = new Stream();
|
|
merged.add(stream3);
|
|
merged.isEmpty();
|
|
//=> false
|
|
```
|
|
|
|
## Description
|
|
|
|
This is adapted from [event-stream](https://github.com/dominictarr/event-stream) separated into a new module, using Streams3.
|
|
|
|
## API
|
|
|
|
### `mergeStream`
|
|
|
|
Type: `function`
|
|
|
|
Merges an arbitrary number of streams. Returns a merged stream.
|
|
|
|
#### `merged.add`
|
|
|
|
A method to dynamically add more sources to the stream. The argument supplied to `add` can be either a source or an array of sources.
|
|
|
|
#### `merged.isEmpty`
|
|
|
|
A method that tells you if the merged stream is empty.
|
|
|
|
When a stream is "empty" (aka. no sources were added), it could not be returned to a gulp task.
|
|
|
|
So, we could do something like this:
|
|
|
|
```js
|
|
stream = require('merge-stream')();
|
|
// Something like a loop to add some streams to the merge stream
|
|
// stream.add(streamA);
|
|
// stream.add(streamB);
|
|
return stream.isEmpty() ? null : stream;
|
|
```
|
|
|
|
## License
|
|
|
|
MIT
|