Make generatorFn more versatile

[jakeboone02]

Pass the items array element as second parameter to generatorFn. This way items can be an array of anything (Backbone.Models, jQuery collections, etc.), and generatorFn can handle it however it wants.

Example:

var i, bigList = [];
for (i = 0; i < 10000; i++) {
  bigList.push({name: "Test Item " + i, desc: "I'm a description"});
}

var list = new VirtualList({
  h: window.innerHeight,
  itemHeight: 30,
  items: bigList,
  generatorFn: function(idx, row) {
    return $("<div>", {text: row.name + " -|- " + row.desc, css: {height: "30px"}})[0];
  }
});

[sergi]

this.items does not necessary exist here, and if it doesn't, trying to access an element in it would crash.

[jakeboone02]

OK, I see. As long as generatorFn had access to items at runtime, it could use the i argument passed to it to find items[i]. A bit constraining but probably not a showstopper in most cases.