Frontend:

If your code is going to be on the frontend (browser), you can use the following:

var row_width = 40;



var content = ;

content += Username + new Array(row_width + 1).join( ) + Passwordn;

content += ******** + new Array(row_width + 1).join( ) + ********n;



for (var i = 0; i < myarray.length; i += 2) {

    content += myarray[i] + new Array(row_width - myarray[i].length + 9).join( );

    content += myarray[i+1];

    content += n;

}



// Build a data URI:

uri = data:application/octet-stream, + encodeURIComponent(content);



// Click on the file to download

// You can also do this as a button that has the href pointing to the data URI

location.href = uri;

Here's a link to a working frontend example: Fiddle

Name the file as something.txt.

Backend:

If you want to use Node.js on the backend to generate and save this file, you need to use the following:

After looping through the array and creating the 'content' string as above, you save the file as follows:

var fs = require('fs');



fs.writeFile(/path_to_file/table.txt, content, function (err){

    if (err) {

        console.log(err);

    } else {

        console.log(File saved);

    }

});

I haven't tried that code yet, but feel free to let me know if it works for you. I hope that's what you need.

NOTE that the frontend code might not be supported by some outdated/bad browsers