This program copies a file using readable and a writable stream with the pipe()
function provided by the stream class
// require the file system module
var fs = require('fs');
/*
Create readable stream to file in current directory named 'node.txt'
Use utf8 encoding
Read the data in 16-kilobyte chunks
*/
var readable = fs.createReadStream(__dirname + '/node.txt', { encoding: 'utf8', highWaterMark: 16 * 1024 });
// create writable stream
var writable = fs.createWriteStream(__dirname + '/nodePipe.txt');
// use pipe to copy readable to writable
readable.pipe(writable);