What 's the simplest way to convert from a single character String to an ASCII value in Swift?

A straightforward method to convert a single character to its ASCII value in Swift involves using the UnicodeScalar struct. Below is a specific example demonstrating how to implement this conversion:

First, verify that the input is a single character. Then, convert this character to a UnicodeScalar and access its value property to obtain the ASCII value. Here is an example code snippet:

swift
func asciiValue(of character: Character) -> UInt32? {
    guard let scalar = character.unicodeScalars.first else {
        return nil
    }
    return scalar.value
}

// Usage example:
if let ascii = asciiValue(of: "A") {
    print("ASCII value of A is \(ascii)")
} else {
    print("Error: Invalid input")
}

In this example, the function asciiValue accepts a parameter of type Character and attempts to retrieve the first UnicodeScalar of the character. If successful, it returns the value property of the scalar, which represents the ASCII value. If the character is not a single scalar (e.g., a composite character or empty character), the function returns nil, indicating that the ASCII value cannot be obtained.

This approach is simple and intuitive, making it ideal for scenarios where you need to handle single characters and their ASCII values.