Question

I have a simple factory below that I would like to simplify and not be required to modify each time I add a new object that I would like to return. In Javascript, how would I be able to create an object at runtime? Thanks

switch (leagueId) {
  case 'NCAAF' :
      return new NCAAFScoreGrid();
  case 'MLB' :
      return new MLBScoreGrid();
  ... 
}

Answer 1

var leagues = {
    'NCAAF': NCAAFScoreGrid,
    'MLB':   MLBScoreGrid,
    // ...
};  // maybe hoist this dictionary out to somewhere shared

if (leagues[leagueId]) {
    return new leagues[leagueId]();
}
// else leagueId unknown