<ul><li>Functional-reactive programming considers everything as a function of time, but this approach can be computationally expensive and inconvenient.</li><li>User interfaces can view time as both a continuous dimension and a series of discrete events.</li><li>Defining time as a sequence of past events can simplify management and testing of actions and reactions in UI.</li><li>Event stream libraries provide operators to reconcile different event sequences into a new one, making time relative and manageable.</li></ul>

Properly improper FRP: Time as a discrete function of events

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