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Diffstat (limited to 'src/doc/book/listings/ch13-functional-features/listing-13-16')
3 files changed, 60 insertions, 0 deletions
diff --git a/src/doc/book/listings/ch13-functional-features/listing-13-16/Cargo.lock b/src/doc/book/listings/ch13-functional-features/listing-13-16/Cargo.lock new file mode 100644 index 000000000..0b15e2157 --- /dev/null +++ b/src/doc/book/listings/ch13-functional-features/listing-13-16/Cargo.lock @@ -0,0 +1,6 @@ +# This file is automatically @generated by Cargo. +# It is not intended for manual editing. +[[package]] +name = "shoe_size" +version = "0.1.0" + diff --git a/src/doc/book/listings/ch13-functional-features/listing-13-16/Cargo.toml b/src/doc/book/listings/ch13-functional-features/listing-13-16/Cargo.toml new file mode 100644 index 000000000..cc803776b --- /dev/null +++ b/src/doc/book/listings/ch13-functional-features/listing-13-16/Cargo.toml @@ -0,0 +1,6 @@ +[package] +name = "shoe_size" +version = "0.1.0" +edition = "2021" + +[dependencies] diff --git a/src/doc/book/listings/ch13-functional-features/listing-13-16/src/lib.rs b/src/doc/book/listings/ch13-functional-features/listing-13-16/src/lib.rs new file mode 100644 index 000000000..281c3c9e4 --- /dev/null +++ b/src/doc/book/listings/ch13-functional-features/listing-13-16/src/lib.rs @@ -0,0 +1,48 @@ +#[derive(PartialEq, Debug)] +struct Shoe { + size: u32, + style: String, +} + +fn shoes_in_size(shoes: Vec<Shoe>, shoe_size: u32) -> Vec<Shoe> { + shoes.into_iter().filter(|s| s.size == shoe_size).collect() +} + +#[cfg(test)] +mod tests { + use super::*; + + #[test] + fn filters_by_size() { + let shoes = vec![ + Shoe { + size: 10, + style: String::from("sneaker"), + }, + Shoe { + size: 13, + style: String::from("sandal"), + }, + Shoe { + size: 10, + style: String::from("boot"), + }, + ]; + + let in_my_size = shoes_in_size(shoes, 10); + + assert_eq!( + in_my_size, + vec![ + Shoe { + size: 10, + style: String::from("sneaker") + }, + Shoe { + size: 10, + style: String::from("boot") + }, + ] + ); + } +} |