mirror of
https://github.com/rust-lang/rustlings.git
synced 2024-12-27 00:00:03 +03:00
63 lines
1.7 KiB
Rust
63 lines
1.7 KiB
Rust
// This is a quiz for the following sections:
|
|
// - Strings
|
|
// - Vecs
|
|
// - Move semantics
|
|
// - Modules
|
|
// - Enums
|
|
//
|
|
// Let's build a little machine in the form of a function. As input, we're going
|
|
// to give a list of strings and commands. These commands determine what action
|
|
// is going to be applied to the string. It can either be:
|
|
// - Uppercase the string
|
|
// - Trim the string
|
|
// - Append "bar" to the string a specified amount of times
|
|
// The exact form of this will be:
|
|
// - The input is going to be a Vector of a 2-length tuple,
|
|
// the first element is the string, the second one is the command.
|
|
// - The output element is going to be a Vector of strings.
|
|
|
|
pub enum Command {
|
|
Uppercase,
|
|
Trim,
|
|
Append(usize),
|
|
}
|
|
|
|
mod my_module {
|
|
use super::Command;
|
|
|
|
// TODO: Complete the function signature!
|
|
pub fn transformer(input: ???) -> ??? {
|
|
// TODO: Complete the output declaration!
|
|
let mut output: ??? = vec![];
|
|
for (string, command) in input.iter() {
|
|
// TODO: Complete the function body. You can do it!
|
|
}
|
|
output
|
|
}
|
|
}
|
|
|
|
fn main() {
|
|
// You can optionally experiment here.
|
|
}
|
|
|
|
#[cfg(test)]
|
|
mod tests {
|
|
// TODO: What do we need to import to have `transformer` in scope?
|
|
use ???;
|
|
use super::Command;
|
|
|
|
#[test]
|
|
fn it_works() {
|
|
let output = transformer(vec![
|
|
("hello".into(), Command::Uppercase),
|
|
(" all roads lead to rome! ".into(), Command::Trim),
|
|
("foo".into(), Command::Append(1)),
|
|
("bar".into(), Command::Append(5)),
|
|
]);
|
|
assert_eq!(output[0], "HELLO");
|
|
assert_eq!(output[1], "all roads lead to rome!");
|
|
assert_eq!(output[2], "foobar");
|
|
assert_eq!(output[3], "barbarbarbarbarbar");
|
|
}
|
|
}
|