সুইফট 5 এর সাহায্যে আপনার সমস্যা সমাধানের জন্য আপনি নীচের পাঁচটি স্নিপেট ব্যবহার করতে পারেন ।
# 1। Dictionary
mapValues(_:)
পদ্ধতি ব্যবহার
let dictionary = ["foo": 1, "bar": 2, "baz": 5]
let newDictionary = dictionary.mapValues { value in
return value + 1
}
//let newDictionary = dictionary.mapValues { $0 + 1 } // also works
print(newDictionary) // prints: ["baz": 6, "foo": 2, "bar": 3]
# 2। Dictionary
map
পদ্ধতি এবং init(uniqueKeysWithValues:)
ইনিশিয়ালাইজার ব্যবহার করে
let dictionary = ["foo": 1, "bar": 2, "baz": 5]
let tupleArray = dictionary.map { (key: String, value: Int) in
return (key, value + 1)
}
//let tupleArray = dictionary.map { ($0, $1 + 1) } // also works
let newDictionary = Dictionary(uniqueKeysWithValues: tupleArray)
print(newDictionary) // prints: ["baz": 6, "foo": 2, "bar": 3]
# 3। Dictionary
reduce(_:_:)
পদ্ধতি বা reduce(into:_:)
পদ্ধতি ব্যবহার করে
let dictionary = ["foo": 1, "bar": 2, "baz": 5]
let newDictionary = dictionary.reduce([:]) { (partialResult: [String: Int], tuple: (key: String, value: Int)) in
var result = partialResult
result[tuple.key] = tuple.value + 1
return result
}
print(newDictionary) // prints: ["baz": 6, "foo": 2, "bar": 3]
let dictionary = ["foo": 1, "bar": 2, "baz": 5]
let newDictionary = dictionary.reduce(into: [:]) { (result: inout [String: Int], tuple: (key: String, value: Int)) in
result[tuple.key] = tuple.value + 1
}
print(newDictionary) // prints: ["baz": 6, "foo": 2, "bar": 3]
# 4। Dictionary
subscript(_:default:)
সাবস্ক্রিপ্ট ব্যবহার করা
let dictionary = ["foo": 1, "bar": 2, "baz": 5]
var newDictionary = [String: Int]()
for (key, value) in dictionary {
newDictionary[key, default: value] += 1
}
print(newDictionary) // prints: ["baz": 6, "foo": 2, "bar": 3]
# 5। Dictionary
subscript(_:)
সাবস্ক্রিপ্ট ব্যবহার করা
let dictionary = ["foo": 1, "bar": 2, "baz": 5]
var newDictionary = [String: Int]()
for (key, value) in dictionary {
newDictionary[key] = value + 1
}
print(newDictionary) // prints: ["baz": 6, "foo": 2, "bar": 3]