What is an associated value?

Sources & Resources

Main Source: 🔗 Ace the iOS Interview

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TL/DR

An associated value is the term used to describe the value accompanying acasein a Swift enum. Associated values allow us to present more nuanceddata by adding contextual information to ourcases.

enum Distance {
    case km(Int)
    case meters(Int)
    case miles(value: Int)
}

Distance.miles(value: 20 )

With Swift, names can be specified for associated values in order to make their use more understandable. Additionally, eachcasecan be associatedwith values of any type and number.

enum Action {
    case tackle
    case random
    case kick(power: Int, speed: Float)
    case jump(height: Int)
    case shootLasers(useBothLasers: Bool)
}