forked from zhurui/management
66 lines
1.4 KiB
Markdown
66 lines
1.4 KiB
Markdown
# ordered-read-streams [](http://badge.fury.io/js/ordered-read-streams) [](https://travis-ci.org/armed/ordered-read-streams)
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Combines array of streams into one read stream in strict order.
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## Installation
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`npm install ordered-read-streams`
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## Overview
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`ordered-read-streams` handles all data/errors from input streams in parallel, but emits data/errors in strict order in which streams are passed to constructor. This is `objectMode = true` stream.
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## Example
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```js
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var through = require('through2');
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var Ordered = require('ordered-read-streams');
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var s1 = through.obj(function (data, enc, next) {
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var self = this;
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setTimeout(function () {
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self.push(data);
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next();
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}, 200)
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});
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var s2 = through.obj(function (data, enc, next) {
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var self = this;
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setTimeout(function () {
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self.push(data);
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next();
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}, 30)
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});
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var s3 = through.obj(function (data, enc, next) {
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var self = this;
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setTimeout(function () {
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self.push(data);
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next();
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}, 100)
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});
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var streams = new Ordered([s1, s2, s3]);
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streams.on('data', function (data) {
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console.log(data);
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})
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s1.write('stream 1');
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s1.end();
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s2.write('stream 2');
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s2.end();
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s3.write('stream 3');
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s3.end();
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```
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Ouput will be:
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```
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stream 1
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stream 2
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stream 3
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```
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## Licence
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MIT
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