StackGenVis: Alignment of Data, Algorithms, and Models for Stacking Ensemble Learning Using Performance Metrics
https://doi.org/10.1109/TVCG.2020.3030352
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69 lines
1.4 KiB
69 lines
1.4 KiB
4 years ago
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/*!
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* src-stream <https://github.com/doowb/src-stream>
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*
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* Copyright (c) 2015, Brian Woodward.
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* Licensed under the MIT License.
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*/
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'use strict';
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var ms = require('merge-stream');
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var through = require('through2');
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var duplexify = require('duplexify');
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/**
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* Wrap a source stream to passthrough any data
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* that's being written to it.
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*
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* ```js
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* var src = require('src-stream');
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*
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* // wrap something that returns a readable stream
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* var stream = src(plugin());
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*
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* fs.createReadStream('./package.json')
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* .pipe(stream)
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* .on('data', console.log)
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* .on('end', function () {
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* console.log();
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* console.log('Finished');
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* console.log();
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* });
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* ```
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*
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* @param {Stream} `stream` Readable stream to be wrapped.
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* @return {Stream} Duplex stream to handle reading and writing.
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* @api public
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*/
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function srcStream(stream) {
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var pass = through.obj();
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pass.setMaxListeners(0);
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var outputstream = duplexify.obj(pass, ms(stream, pass));
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outputstream.setMaxListeners(0);
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var isReading = false;
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outputstream.on('pipe', function (src) {
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isReading = true;
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src.on('end', function () {
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isReading = false;
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outputstream.end();
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});
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});
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stream.on('end', function () {
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if (!isReading) {
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outputstream.end();
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}
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});
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return outputstream;
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}
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/**
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* Expose `srcStream`
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*/
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module.exports = srcStream;
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