// file2.js content:

function ArrObj(arr){
    this.originArr = arr;
    this.doubledArr = 2*arr;
}
ArrObj.prototype.shiftedArr = function(shift) {return this.originArr + shift};

exports.arrObj = ArrObj;


// file1.js content:

var arrModule = require("./file2");
var arrObjInstance1 = new arrModule.ArrObj(400);