How to use the key path as functions in Swift 5+?

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From Swift 5.2 key path can be passed as functions. Using key path closures seems much more simpler and readable.

struct Food {
    let name: String
    let isHot: Bool
    let origin: String
}

let foods: [Food] = some foods here

let foodNames = foods.map(\.name)
// Same as foods.map { $0.name }
// These ad hoc closures are short and sweet but 
// Swift already has a shorter and sweeter syntax 
// that can describe this: key paths. 

let hotFoods = foods.filter(\.isHot)
// Same as foods.filter { $0.isHot }

✍️ Written by Ishtiak Ahmed

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