add some special property to "normalize" params before dispatching routed about crossroads.js HOT 2 CLOSED

var myRoute = crossroads.addRoute('{a}/{b}/:c:/:d:');

myRoute.rules = {

  a : ['news', 'article'],

  b : /^[-_0-9a-zA-Z]+$/,

  d : /^[-\w]+$/,

  request_ : /\/[0-9]+\/|$/, //should contain at least 1 segment with numeric value

  normalize_ : function(request, vals){
    var id, 
        idRegex = /^\d+$/;
    if(vals.a === 'article'){
      id = vals.c;
    } else {
      id = idRegex.test(vals.b)? vals.b : vals.c;
    }
    return ['news', id]; //return params
  }

};