Rust function for modifying characters with Closure

Last update on December 21 2024 10:22:19 (UTC/GMT +8 hours)

Write a Rust function that takes a closure and a vector of characters. Apply the closure to each character, and returns a new vector of modified characters.

Sample Solution:

Rust Code:

fn apply_closure_to_chars<F>(chars: Vec<char>, closure: F) -> Vec<char>
where
    F: Fn(char) -> char, // Closure trait bound
{
    chars.into_iter() // Convert the input vector into an iterator
        .map(closure) // Apply the closure to each character
        .collect() // Collect the modified characters into a new vector
}

fn main() {
    let chars = vec!['A', 'B', 'C', 'D', 'E'];
     println!("Original characters: {:?}", chars); // Print original characters
    let modified_chars = apply_closure_to_chars(chars, |c| c.to_ascii_lowercase()); // Example usage: Convert each character to uppercase
    println!("Modified characters: {:?}", modified_chars);
}

Output:

Original characters: ['A', 'B', 'C', 'D', 'E']
Modified characters: ['a', 'b', 'c', 'd', 'e']

Explanation:

In the exercise above,

• apply_closure_to_chars: This function takes a vector of characters 'chars' and a closure 'closure' as arguments. The closure takes a 'char' and returns a 'char'.
• Inside the function, the 'chars' vector is converted into an iterator. The "map()" method is used to apply the closure to each character, transforming each element.
• Finally, the "collect()" method is used to collect the modified characters into a new vector.
• In the "main()" function, an example usage of "apply_closure_to_chars()" function takes a vector of characters and applies a closure that converts each character to uppercase. Finally, it prints the modified characters.

Rust Code Editor:

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