var zipcodeTW = require('zipcode-taiwan');
 
// Fetching raw data
var fetcher = zipcodeTW.fetch();
 
// Creating a parser to convert raw data to JavaScript object
var parser = zipcodeTW.parse();
 
parser.on('data', function(data) {
    console.log(data);
});
 
fetcher.pipe(parser);

var fs = require('fs');
var zipcodeTW = require('zipcode-taiwan');
 
weatherTW
    .fetch()
    .pipe(zipcodeTW.parse({ outputString: true }))
    .pipe(fs.createWriteStream('zipcode.json'));