相关疑难解决方法(0)

我需要弄清楚从我的Knockout observableArray中删除了哪个元素.请看我的jsFiddle.

我可以订阅更改,但它只返回value,这是添加或删除后的当前数组.

self.selectedDataPointOptions.subscribe(function(value) {
  // how can I see which one was added or removed?
  alert(value);
});