request.cache.js

var request = {
  values: new HashTable, // https://github.com/BorisKozo/jsHash
  cache: function(func) {
    if (value = values.get(func)) {
      return value
    }
    var args = Array.prototype.slice(arguments, 1)
    var value = func.apply(null, args)
    values.set(func, value)
    return value
  }
}

function getFood(name) {
}

var apple = request.cache(getFood, "apple")