Dictionaries
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var airports = ["YYZ": "Toronto Pearson", "DUB": "Dublin"]
print("The airports dictionary contains \(airports.count) items.")
// Mencetak "The airports dictionary contains 2 items."
if airports.isEmpty {
print("The airports dictionary is empty.")
} else {
print("The airports dictionary is not empty.")
}
// Mencetak "The airports dictionary is not empty."
airports["LHR"] = "London"
// sekarang dictionary airports berisi 3 items
airports["LHR"] = "London Heathrow"
// nilai dari "LHR" akan berubah menjadi "London Heathrow"
if let oldValue = airports.updateValue("Dublin Airport", forKey: "DUB") {
print("The old value for DUB was \(oldValue).")
}
// Mencetak "The old value for DUB was Dublin."
if let removedValue = airports.removeValue(forKey: "DUB") {
print("The removed airport's name is \(removedValue).")
} else {
print("The airports dictionary does not contain a value for DUB.")
}
// Mencetak "The removed airport's name is Dublin Airport."
for (airportCode, airportName) in airports {
print("\(airportCode): \(airportName)")
}
// LHR: London Heathrow
// YYZ: Toronto Pearson
for airportCode in airports.keys {
print("Airport code: \(airportCode)")
}
// Airport code: LHR
// Airport code: YYZ
for airportName in airports.values {
print("Airport name: \(airportName)")
}
// Airport name: London Heathrow
// Airport name: Toronto Pearson
let airportCodes = [String](airports.keys)
// airportCodes adalah ["LHR", "YYZ"]
let airportNames = [String](airports.values)
// airportNames adalah ["London Heathrow", "Toronto Pearson"]
Swift
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