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-// 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");
- }
-}