RxSwift: Just Operator

• .just operator creates an observable sequence containing just a single element and a .completed event.
• Type inference means we don’t need to define the type.

let lotteryNumberOne = 1
let lotteryNumberTwo = 2
let lotteryNumberThree = 3

let observable: Observable<Int> = Observable<Int>.just(lotteryNumberOne)
// Observable containing just lotteryNumberOne i.e. 1

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