rOACCT/node_modules/merge-stream078f80032ad6issn4frontend
rOACCT/node_modules/merge-stream
078f80032ad6issn4frontend
merge-stream
merge-stream
README.md
README.md
merge-stream
Merge (interleave) a bunch of streams.
![build status](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 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;
Gulp example
An example use case for merge-stream is to combine parts of a task in a project's gulpfile.js like this:
js const gulp = require('gulp'); const htmlValidator = require('gulp-w3c-html-validator'); const jsHint = require('gulp-jshint'); const mergeStream = require('merge-stream'); function lint() { return mergeStream( gulp.src('src/*.html') .pipe(htmlValidator()) .pipe(htmlValidator.reporter()), gulp.src('src/*.js') .pipe(jsHint()) .pipe(jsHint.reporter()) ); } gulp.task('lint', lint);
License
MIT
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