implement and test subtraction

[rust-101.git] / src / part00.rs

diff --git a/src/part00.rs b/src/part00.rs
index 06bb20593cd316d162152dbc2c530a2cba6a2a58..6469907e91203f62f856a8a8e25c229c9b7a41c1 100644 (file)
--- a/src/part00.rs
+++ b/src/part00.rs
@@ -35,8 +35,7 @@ fn vec_min(vec: Vec<i32>) -> NumberOrNothing {
     //@ immutable per default, and you need to tell Rust if you want
     //@ to change a variable later.
 
     //@ immutable per default, and you need to tell Rust if you want
     //@ to change a variable later.
 

-    // Now we want to *iterate* over the list. Rust has some nice syntax for
-    // iterators:
+    // 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:
     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:


@@ -83,8 +82,7 @@ fn read_vec() -> Vec<i32> {
     vec![18,5,7,1,9,27]                                             /*@*/
 }
 
     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, we would also like to actually see the result of the computation, 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.
 
 //@ 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.
 


@@ -105,8 +103,9 @@ pub fn main() {
     print_number_or_nothing(min);
 }
 
     print_number_or_nothing(min);
 }
 

-// You can now use `cargo build` to compile your code. If all goes well, try `cargo run` on the
-// console to run it.
+//@ You can now use `cargo build` to compile your *crate*. That's Rust's name for a *compilation unit*, which in
+//@ the case of Rust means an application or a library. <br/>
+// Finally, try `cargo run` on the console to run it.

 
 //@ Yay, it said "1"! That's actually the right answer. Okay, we could have
 //@ computed that ourselves, but that's besides the point. More importantly:
 
 //@ Yay, it said "1"! That's actually the right answer. Okay, we could have
 //@ computed that ourselves, but that's besides the point. More importantly: