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feat: Refactor hint system

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Hints are now accessible using the CLI subcommand `rustlings hint
<exercise name`.

BREAKING CHANGE: This fundamentally changes the way people interact with exercises.
This commit is contained in:
marisa
2019-11-11 16:51:38 +01:00
parent 627cdc07d0
commit 9bdb0a12e4
47 changed files with 400 additions and 1681 deletions
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36
exercises/primitive_types/primitive_types3.rs
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@@ -1,6 +1,6 @@
// primitive_types3.rs
// Create an array with at least 100 elements in it where the ??? is.
// Scroll down for hints!
// Execute `rustlings hint primitive_types3` for hints!
fn main() {
let a = ???
@@ -11,37 +11,3 @@ fn main() {
println!("Meh, I eat arrays like that for breakfast.");
}
}
// There's a shorthand to initialize Arrays with a certain size that does not
// require you to type in 100 items (but you certainly can if you want!).
// For example, you can do:
// let array = ["Are we there yet?"; 10];
// Bonus: what are some other things you could have that would return true
// for `a.len() >= 100`?

58
exercises/primitive_types/primitive_types4.rs
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@@ -1,6 +1,6 @@
// primitive_types4.rs
// Get a slice out of Array a where the ??? is so that the `if` statement
// returns true. Scroll down for hints!!
// returns true. Execute `rustlings hint primitive_types4` for hints!!
#[test]
fn main() {
@@ -10,59 +10,3 @@ fn main() {
assert_eq!([2, 3, 4], nice_slice)
}
// Take a look at the Understanding Ownership -> Slices -> Other Slices section of the book:
// https://doc.rust-lang.org/book/ch04-03-slices.html
// and use the starting and ending indices of the items in the Array
// that you want to end up in the slice.
// If you're curious why the right hand of the `==` comparison does not
// have an ampersand for a reference since the left hand side is a
// reference, take a look at the Deref coercions section of the book:
// https://doc.rust-lang.org/book/ch15-02-deref.html

37
exercises/primitive_types/primitive_types5.rs
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@@ -1,6 +1,6 @@
// primitive_types5.rs
// Destructure the `cat` tuple so that the println will work.
// Scroll down for hints!
// Execute `rustlings hint primitive_types5` for hints!
fn main() {
let cat = ("Furry McFurson", 3.5);
@@ -8,38 +8,3 @@ fn main() {
println!("{} is {} years old.", name, age);
}
// Take a look at the Data Types -> The Tuple Type section of the book:
// https://doc.rust-lang.org/book/ch03-02-data-types.html#the-tuple-type
// Particularly the part about destructuring (second to last example in the section).
// You'll need to make a pattern to bind `name` and `age` to the appropriate parts
// of the tuple. You can do it!!

38
exercises/primitive_types/primitive_types6.rs
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@@ -1,45 +1,9 @@
// primitive_types6.rs
// Use a tuple index to access the second element of `numbers`.
// You can put this right into the `println!` where the ??? is.
// Scroll down for hints!
// Execute `rustlings hint primitive_types6` for hints!
fn main() {
let numbers = (1, 2, 3);
println!("The second number is {}", ???);
}
// While you could use a destructuring `let` for the tuple here, try
// indexing into it instead, as explained in the last example of the
// Data Types -> The Tuple Type section of the book:
// https://doc.rust-lang.org/book/ch03-02-data-types.html#the-tuple-type
// Now you have another tool in your toolbox!