�PNG  IHDR��;���IDATx��ܻn�0���K�� �)(�pA��� ���7�LeG{�� �§㻢|��ذaÆ 6lذaÆ 6lذaÆ 6lom��$^�y���ذag�5bÆ 6lذaÆ 6lذa{���� 6lذaÆ �`����}H�Fkm�,�m����Ӫ���ô�ô!� �x�|'ܢ˟;�E:���9�&ᶒ�}�{�v]�n&�6� �h��_��t�ڠ͵-ҫ���Z;��Z$�.�P���k�ž)�!��o���>}l�eQfJ�T��u і���چ��\��X=8��Rن4`Vw�l�>����n�G�^��i�s��"ms�$�u��i��?w�bs[m�6�K4���O���.�4��%����/����b�C%��t ��M�ז� �-l�G6�mrz2���s�%�9��s@���-�k�9�=���)������k�B5����\��+͂�Zsٲ ��Rn��~G���R���C����� �wIcI��n7jJ���hۛNCS|���j0��8y�iHKֶۛ�k�Ɉ+;Sz������L/��F�*\��Ԕ�#"5��m�2��[S��������=�g��n�a�P�e�ғ�L�� lذaÆ 6l�^k��̱aÆ 6lذaÆ 6lذa;���� �_��ذaÆ 6lذaÆ 6lذaÆ ���R���IEND�B` # merge-stream Merge (interleave) a bunch of streams. [![build status](https://secure.travis-ci.org/grncdr/merge-stream.svg?branch=master)](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; ``` ## 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