I was reading following document (https://developer.salesforce.com/docs/atlas.en-us.lightning.meta/lightning/ui_events.htm), but there is nowhere specified how to find out, which UI component triggers the event...we can only specify handler for it.
Scenario: I have lot of ui:inputNumber components in table and I need an event to send its value on change to another component.
Is it possible to find out in handler, which UI components triggered the "change" event from ui:inputNumber?