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Merge (interleave) a bunch of streams.
var stream1 = new Stream(); var stream2 = new Stream(); var merged = mergeStream(stream1, stream2); var stream3 = new Stream(); merged.add(stream3); merged.isEmpty(); //=> false
This is adapted from event-stream separated into a new module, using Streams3.
Merges an arbitrary number of streams. Returns a merged stream.
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.
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:
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;