javascript - How do I export an array with module.exports in node js?

I have a project using node.js. It's my first time using nodejs and I want to export an array to my app. Here is some code:

module.exports = { 
    var arrays = [];
    arrays[0] = 'array 0';

    arrays[1] = 'array 1';
    arrays[2] = 'array 2';
    arrays[3] = 'array 3';
    arrays[4] = 'array 4';
    var r_array = arrays[Math.floor(Math.random() * arrays.length)].toString();
}

At the end I want to use the var r_array in my app.js but I don't know how.

Answer

You'd want to define a function which returns the randomized portion of the array:

module.exports = {
  getRArray: function() {
    var arrays = [];
    arrays[0] = 'array 0';
    arrays[1] = 'array 1';
    arrays[2] = 'array 2';
    arrays[3] = 'array 3';
    arrays[4] = 'array 4';

    return arrays[Math.floor(Math.random()*arrays.length)];
  }
};

Also you should embed the array into the function so it actually returns something.