Powerful Predicates - SwiftMoji Entry #26

PowerfulPredicates.swift

import Foundation

@objcMembers class Craft: NSObject {
    let name: String
    let maxAltitude: Int
    let maxSpeed: Int
    
    init(name: String, maxAltitude: Int, maxSpeed: Int) {
        self.name = name
        self.maxAltitude = maxAltitude
        self.maxSpeed = maxSpeed
    }
    
    override var description: String { name }
}

let 🛩 = Craft(name: "Gulfstream G550", maxAltitude: 49500, maxSpeed: 585)
let 🛬 = Craft(name: "gulfstream g650", maxAltitude: 51000, maxSpeed: 610)
let 🚀 = Craft(name: "BFR", maxAltitude: Int.max, maxSpeed: 18000)
let 🚁 = Craft(name: "Bell 407", maxAltitude: 17618, maxSpeed: 162)
let crafts = [🛩, 🛬, 🚀, 🚁] as NSArray

let predicate = NSPredicate(format: "(name BEGINSWITH[c] %@) AND (maxAltitude BETWEEN { 25000, 50000 })", "Gulfstream")
let listings = crafts.filtered(using: predicate)
print(listings) // [Gulfstream G550]