A simple version class

version.js

var Version = function (major, minor, patch) {
  this.major = major
  this.minor = minor
  this.patch = patch
}

Version.prototype.toString = function () {
  return [this.major, this.minor, this.patch].join(".")
}

Version.prototype.isValid = function () {
  var pass = true

  _.each([this.major, this.minor, this.patch], function (n) {
    // Pass if this chunk of the version is a number and is not NaN
    // Protip: comparing NaN to itself will return false.
    if (typeof(n) !== "number" || n !== n) {
      pass = false
    }
  })

  return pass ? true : false;
};