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Arthur DANJOU
f4120eabdf
- Created empty solution files for various exercises in strings, modules, hashmaps, options, error handling, generics, traits, lifetimes, tests, iterators, smart pointers, threads, macros, clippy, conversions, and quizzes. - Each solution file contains a main function with a comment indicating that it will be automatically filled after completing the exercise. - Added a README.md file to provide information about the solutions and their purpose.
78 lines
2.1 KiB
Rust
78 lines
2.1 KiB
Rust
// This is a quiz for the following sections:
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// - Strings
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// - Vecs
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// - Move semantics
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// - Modules
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// - Enums
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//
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// Let's build a little machine in the form of a function. As input, we're going
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// to give a list of strings and commands. These commands determine what action
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// is going to be applied to the string. It can either be:
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// - Uppercase the string
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// - Trim the string
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// - Append "bar" to the string a specified amount of times
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//
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// The exact form of this will be:
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// - The input is going to be a Vector of 2-length tuples,
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// the first element is the string, the second one is the command.
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// - The output element is going to be a vector of strings.
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enum Command {
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Uppercase,
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Trim,
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Append(usize),
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}
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mod my_module {
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use super::Command;
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// TODO: Complete the function as described above.
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pub fn transformer(input: Vec<(String, Command)>) -> Vec<String> {
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input.iter().map(|(s, cmd)| {
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match cmd {
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Command::Uppercase => s.to_uppercase(),
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Command::Trim => s.trim().to_string(),
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Command::Append(n) => {
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let mut result = s.clone();
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for _ in 0..*n {
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result.push_str("bar");
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}
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result
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}
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}
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}).collect()
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}
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}
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fn main() {
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// You can optionally experiment here.
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}
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#[cfg(test)]
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mod tests {
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// TODO: What do we need to import to have `transformer` in scope?
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use super::my_module::transformer;
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use super::Command;
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#[test]
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fn it_works() {
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let input = vec![
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("hello".to_string(), Command::Uppercase),
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(" all roads lead to rome! ".to_string(), Command::Trim),
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("foo".to_string(), Command::Append(1)),
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("bar".to_string(), Command::Append(5)),
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];
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let output = transformer(input);
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assert_eq!(
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output,
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[
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"HELLO",
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"all roads lead to rome!",
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"foobar",
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"barbarbarbarbarbar",
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]
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);
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}
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}
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