Stream Adventure Solution to Concat

concat

var stream = require('stream');

var liner = new stream.Transform( { objectMode: true } );

liner._buffer = '';
liner._transform = function (chunk, encoding, done) {
    var self = this;
    var data = chunk.toString();
    this._buffer = this._buffer + data
    done();
};

liner._flush = function (done) {
     this._buffer =  this._buffer.split("").reverse().join("")
    this.push(this._buffer)
    this.push('\n' + "")
    done();
};



process.stdin.pipe(liner).pipe(process.stdout);