maael/node-data-preprocessing

var bigInt = require('big-integer');
var extract = function(options, source) {
    options = options || {};
    options.path = options.path || '';
    options.format = options.format || 'csv';
    options.useHeaders = options.useHeaders || false;
    var result = [],
        i = ((options.useHeaders) ? 0 : 1);
    for(var j = 0; j < source[0].length; j++) {
        result.push([]);
    }    
    for(i; i < source.length; i++) {
        for(var j = 0; j < source[i].length; j++) {
            if((source[i][j]).toString().length > 15) {
                result[j].push(bigInt(source[i][j]));    
            } else {
                result[j].push(parseFloat(source[i][j]));
            }
        }
    }
    return result;
};

module.exports = extract;