How to Convert a Dictionary to an Array of Keys in Swift

How to Convert a Dictionary to an Array of Keys in Swift ?

Answer

To convert a dictionary to an array of keys in Swift, you can use the `keys` property of the dictionary and convert it to an array. This allows you to create an array containing all the keys in the dictionary.

✐ Examples

1 Converting a Dictionary to an Array of Keys Using `keys` Property

We can convert a dictionary to an array of keys in Swift using the `keys` property. This example demonstrates how to declare and initialize a dictionary, use the `keys` property to get the keys, convert them to an array, and print the array of keys.

For example,

We start by declaring and initializing a dictionary named myDictionary with integer keys and string values.
We use the `keys` property to get the keys from the dictionary.
We convert the keys to an array.
We print the array of keys.

Swift Program

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

// Convert the dictionary to an array of keys
let keysArray = Array(myDictionary.keys)

// Print the array of keys
print("Array of keys:")
for key in keysArray {
    print(key)
}

Output

Array of keys:
1
2
3

2 Converting an Empty Dictionary to an Array of Keys

We can convert an empty dictionary to an array of keys in Swift using the `keys` property. This example demonstrates how to declare and initialize an empty dictionary, use the `keys` property to get the keys, convert them to an array, and print the array of keys.

For example,

We start by declaring and initializing an empty dictionary named myDictionary.
We use the `keys` property to get the keys from the dictionary.
We convert the keys to an array.
We print the array of keys.

Swift Program

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

// Convert the dictionary to an array of keys
let keysArray = Array(myDictionary.keys)

// Print the array of keys
print("Array of keys:")
for key in keysArray {
    print(key)
}

Output

Array of keys:

Summary

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

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How to Convert a Dictionary to an Array of Keys in Swift