var Streamque = require('stream-que');
var highway = Streamque([
    'Hello ',
    fs.createReadStream('./file/world')
]);
 
highway.stream().pipe(process.stdout);
/*
* Assuming the file "./file/world" contains "world."
* The outcome in your console would be "Hello world."
*/

var highway = Streamque([
    'Hello ',
    fs.createReadStream( './file/world' )
]);
 
highway.count().then((total) => {
    console.log( 'Total size: ' + total )
    highway.stream().pipe( process.stdout )
});
/*
* Total size: 12
* Hello world.
*/

highway.start();
// and it flows.