js-model `uid`s persist over localStorage page refreshes and are useful when you don't have a real `id`

blah.js

////////////////
// IN CONSOLE //
////////////////

Blah = Model("blah", {
  persistence: Model.localStorage(),

  find_by_uid: function(uid) {
    return this.detect(function() {
      return this.uid == uid
    })
  }
})

blah = new Blah({ name: "Blah" })
blah.uid
// => "blah-1298988849274-662"

blah.save()

Blah.all()
// => [blah]

//////////////////
// REFRESH PAGE //
//////////////////

Blah = Model("blah", {
  persistence: Model.localStorage(),

  find_by_uid: function(uid) {
    return this.detect(function() {
      return this.uid == uid
    })
  }
})

Blah.all()
// => []

Blah.load()

Blah.all()
// => [blah]

// Use the uid returned earlier.
Blah.find_by_uid("blah-1298988849274-662")
// => blah