Swift Tutorials

How to Convert a Dictionary to an Array of Key-Value Pairs in Swift

How to Convert a Dictionary to an Array of Key-Value Pairs in Swift ?

Answer

To convert a dictionary to an array of key-value pairs in Swift, you can use the `map` method on the dictionary's `keys` or `values` properties. This allows you to create an array containing all the key-value pairs in the dictionary.

✐ Examples

1 Converting a Dictionary to an Array of Key-Value Pairs Using `map`

We can convert a dictionary to an array of key-value pairs in Swift using the `map` method. This example demonstrates how to declare and initialize a dictionary, use the `map` method to get the key-value pairs, and print the array of key-value pairs.

For example,

We start by declaring and initializing a dictionary named myDictionary with integer keys and string values.
We use the `map` method to get the key-value pairs from the dictionary.
We print the array of key-value pairs.

Swift Program

var myDictionary: [Int: String] = [
    1: "One",
    2: "Two",
    3: "Three"
]

// Convert the dictionary to an array of key-value pairs
let keyValueArray = myDictionary.map { (key, value) in (key, value) }

// Print the array of key-value pairs
print("Array of key-value pairs:")
for (key, value) in keyValueArray {
    print("Key: \(key), Value: \(value)")
}

Output

Array of key-value pairs:
Key: 1, Value: One
Key: 2, Value: Two
Key: 3, Value: Three

2 Converting an Empty Dictionary to an Array of Key-Value Pairs

We can convert an empty dictionary to an array of key-value pairs in Swift using the `map` method. This example demonstrates how to declare and initialize an empty dictionary, use the `map` method to get the key-value pairs, and print the array of key-value pairs.

For example,

We start by declaring and initializing an empty dictionary named myDictionary.
We use the `map` method to get the key-value pairs from the dictionary.
We print the array of key-value pairs.

Swift Program

var myDictionary: [Int: String] = [:]

// Convert the dictionary to an array of key-value pairs
let keyValueArray = myDictionary.map { (key, value) in (key, value) }

// Print the array of key-value pairs
print("Array of key-value pairs:")
for (key, value) in keyValueArray {
    print("Key: \(key), Value: \(value)")
}

Output

Array of key-value pairs:

Summary

In this tutorial, we learned How to Convert a Dictionary to an Array of Key-Value Pairs in Swift language with well detailed examples.

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How to Convert a Dictionary to an Array of Key-Value Pairs in Swift