public/subjects/expected_variable

expected_variable

Instructions

Create a function expected_variable that receives two strings: one to be evaluated and the other to be compared to (expected) and returns an Option. Every comparison should be case insensitive.

If the evaluated string is not in camel case or in snake case (use the case crate for this evaluation) expected_variable returns None. Otherwise the evaluated string should be compared to the expected string using the edit_distance function that you did in one of the previous quests.

If the result of edit_distance has more than 50% of 'alikeness' to the expected string, considering the length of the expected string and the result of edit_distance, the function should return that same percentage with a '%' symbol in front of the number. Otherwise expected_value should return None.

Notions

• Crate case
• Specifying Dependencies

Expected Function

For this exercise the signature of the function has to be found out.

Usage

Here is a program to test your function:

use expected_variable::*;

fn main() {
    println!(
        "{} close to it",
        expected_variable("On_Point", "on_point").unwrap()
    );
    println!(
        "{} close to it",
        expected_variable("soClose", "So_Close").unwrap()
    );
    println!(
        "{:?}",
        expected_variable("something", "something_completely_different")
    );
    println!(
        "{} close to it",
        expected_variable("BenedictCumberbatch", "BeneficialCucumbersnatch").unwrap()
    );
}

And its output:

$ cargo run
100% close to it
88% close to it
None
67% close to it
$