X-Git-Url: https://git.ralfj.de/rust-101.git/blobdiff_plain/229b86d07e94cd3ec175051a44b3f3cb45b40b65..ab7f9b241429bd675b437d2437799de75d2f409b:/workspace/src/part00.rs

diff --git a/workspace/src/part00.rs b/workspace/src/part00.rs
deleted file mode 100644
index 4f7b403..0000000
--- a/workspace/src/part00.rs
+++ /dev/null
@@ -1,89 +0,0 @@
-// ***Remember to enable/add this part in `main.rs`!***
-
-// Rust-101, Part 00: Algebraic datatypes
-// ======================================
-
-// As our first piece of Rust code, we want to write a function that computes the
-// minimum of a list.
-
-
-// An `enum` for "a number or nothing" could look as follows:
-enum NumberOrNothing {
-    Number(i32),
-    Nothing
-}
-
-// Observe how in Rust, the return type comes *after* the arguments.
-fn vec_min(vec: Vec<i32>) -> NumberOrNothing {
-    let mut min = NumberOrNothing::Nothing;
-
-    // Now we want to *iterate* over the list. Rust has some nice syntax for
-    // iterators:
-    for el in vec {
-        // So `el` is al element of the list. We need to update `min` accordingly, but how do we get the current
-        // number in there? This is what pattern matching can do:
-        match min {
-            // In this case (*arm*) of the `match`, `min` is currently nothing, so let's just make it the number `el`.
-            NumberOrNothing::Nothing => {
-                unimplemented!()
-            },
-            // In this arm, `min` is currently the number `n`, so let's compute the new minimum and store it. We will write
-            // the function `min_i32` just after we completed this one.
-            NumberOrNothing::Number(n) => {
-                unimplemented!()
-            }
-        }
-    }
-    // Finally, we return the result of the computation.
-    return min;
-}
-
-// Now that we reduced the problem to computing the minimum of two integers, let's do that.
-fn min_i32(a: i32, b: i32) -> i32 {
-    if a < b {
-        unimplemented!()
-    } else {
-        unimplemented!()
-    }
-}
-
-// Phew. We wrote our first Rust function! But all this `NumberOrNothing::` is getting kind of
-// ugly. Can't we do that nicer?
-
-// Indeed, we can: The following line tells Rust to take
-// the constructors of `NumberOrNothing` into the local namespace.
-// Try moving that above the function, and removing all the occurrences `NumberOrNothing::`.
-use self::NumberOrNothing::{Number,Nothing};
-
-// To call this function, we now just need a list. Of course, ultimately we want to ask the user for
-// a list of numbers, but for now, let's just hard-code something.
-
-// `vec!` is a *macro* (as you can tell from the `!`) that constructs a constant `Vec<_>` with the given
-// elements.
-fn read_vec() -> Vec<i32> {
-    vec![18,5,7,1,9,27]
-}
-
-// Finally, let's call our functions and run the code!
-// But, wait, we would like to actually see something, so we need to print the result.
-// Of course Rust can print numbers, but after calling `vec_min`, we have a `NumberOrNothing`.
-// So let's write a small helper function that prints such values.
-
-fn print_number_or_nothing(n: NumberOrNothing) {
-    match n {
-        Nothing => println!("The number is: <nothing>"),
-        Number(n) => println!("The number is: {}", n),
-    };
-}
-
-// Putting it all together:
-pub fn main() {
-    let vec = read_vec();
-    let min = vec_min(vec);
-    print_number_or_nothing(min);
-}
-
-// Now try `cargo run` on the console to run above code.
-
-
-// [index](main.html) | previous | [next](part01.html)