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| -rw-r--r-- | functional/Cargo.toml | 7 | ||||
| -rw-r--r-- | functional/src/main.rs | 50 |
2 files changed, 57 insertions, 0 deletions
diff --git a/functional/Cargo.toml b/functional/Cargo.toml new file mode 100644 index 0000000..960ba85 --- /dev/null +++ b/functional/Cargo.toml @@ -0,0 +1,7 @@ +[package] +name = "functional" +version = "0.1.0" +authors = ["Adam Carpenter <53hornet@gmail.com>"] +edition = "2018" + +[dependencies] diff --git a/functional/src/main.rs b/functional/src/main.rs new file mode 100644 index 0000000..4fbc447 --- /dev/null +++ b/functional/src/main.rs @@ -0,0 +1,50 @@ +use std::thread; +use std::time::Duration; + +struct Cacher<T> + where T: Fn(u32) -> u32 +{ + calculation: T, + value: Option<u32>, +} + +fn main() { + let simulated_user_specified_value = 10; + let simulated_random_number = 7; + + generate_workout( + simulated_user_specified_value, + simulated_random_number + ); +} + +fn generate_workout(intensity: u32, random_number: u32) { + let expensive_closure = |num| { + println!("calculating slowly..."); + thread::sleep(Duration::from_secs(2)); + num + }; + + if intensity < 25 { + println!( + "Today, do {} pushups!", + expensive_closure(intensity) + ); + println!( + "Next, do {} situps!", + expensive_closure(intensity) + ); + } + else { + if random_number == 3 { + println!("Take a break today! Remember to stay hydrated!"); + } + else { + println!( + "Today, run for {} minutes!", + expensive_closure(intensity) + ); + } + } +} + |