gistfile1.js

function parse(text) { 
    return text.split('\n')
        .map(function(l) {
            return l.split(/\s+/).map(Number)
            }) };
            
            
var fs = require('fs')
  , filename = "myfile.txt"
  , data = fs.readFileSync(filename, { encoding: 'utf8'} );
  
  
console.log(data);
  
/* now data contains your numbers as nested arrays */