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Solve structs exercises (#8)

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* Solve struct exercise 1

* Solve struct exercise 2

* Solve struct3
This commit is contained in:
Jonathan Zernik 2022-06-07 23:15:05 -07:00 committed by GitHub
parent e568210d05
commit 8d123939b4
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3 changed files with 19 additions and 13 deletions
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15
exercises/structs/structs1.rs
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@ -1,13 +1,13 @@
// structs1.rs // structs1.rs
// Address all the TODOs to make the tests pass! // Address all the TODOs to make the tests pass!
// I AM NOT DONE
struct ColorClassicStruct { struct ColorClassicStruct {
// TODO: Something goes here // TODO: Something goes here
name: String,
hex: String,
} }
struct ColorTupleStruct(/* TODO: Something goes here */); struct ColorTupleStruct(String, String);
#[derive(Debug)] #[derive(Debug)]
struct UnitStruct; struct UnitStruct;
@ -19,7 +19,10 @@ mod tests {
#[test] #[test]
fn classic_c_structs() { fn classic_c_structs() {
// TODO: Instantiate a classic c struct! // TODO: Instantiate a classic c struct!
// let green = let green = ColorClassicStruct {
name: String::from("green"),
hex: String::from("#00FF00"),
};
assert_eq!(green.name, "green"); assert_eq!(green.name, "green");
assert_eq!(green.hex, "#00FF00"); assert_eq!(green.hex, "#00FF00");
@ -28,7 +31,7 @@ mod tests {
#[test] #[test]
fn tuple_structs() { fn tuple_structs() {
// TODO: Instantiate a tuple struct! // TODO: Instantiate a tuple struct!
// let green = let green = ColorTupleStruct(String::from("green"), String::from("#00FF00"));
assert_eq!(green.0, "green"); assert_eq!(green.0, "green");
assert_eq!(green.1, "#00FF00"); assert_eq!(green.1, "#00FF00");
@ -37,7 +40,7 @@ mod tests {
#[test] #[test]
fn unit_structs() { fn unit_structs() {
// TODO: Instantiate a unit struct! // TODO: Instantiate a unit struct!
// let unit_struct = let unit_struct = UnitStruct;
let message = format!("{:?}s are fun!", unit_struct); let message = format!("{:?}s are fun!", unit_struct);
assert_eq!(message, "UnitStructs are fun!"); assert_eq!(message, "UnitStructs are fun!");

8
exercises/structs/structs2.rs
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@ -1,8 +1,6 @@
// structs2.rs // structs2.rs
// Address all the TODOs to make the tests pass! // Address all the TODOs to make the tests pass!
// I AM NOT DONE
#[derive(Debug)] #[derive(Debug)]
struct Order { struct Order {
name: String, name: String,
@ -34,7 +32,11 @@ mod tests {
fn your_order() { fn your_order() {
let order_template = create_order_template(); let order_template = create_order_template();
// TODO: Create your own order using the update syntax and template above! // TODO: Create your own order using the update syntax and template above!
// let your_order = let your_order = Order {
name: String::from("Hacker in Rust"),
count: 1,
..order_template
};
assert_eq!(your_order.name, "Hacker in Rust"); assert_eq!(your_order.name, "Hacker in Rust");
assert_eq!(your_order.year, order_template.year); assert_eq!(your_order.year, order_template.year);
assert_eq!(your_order.made_by_phone, order_template.made_by_phone); assert_eq!(your_order.made_by_phone, order_template.made_by_phone);

9
exercises/structs/structs3.rs
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@ -4,8 +4,6 @@
// Make the code compile and the tests pass! // Make the code compile and the tests pass!
// If you have issues execute `rustlings hint structs3` // If you have issues execute `rustlings hint structs3`
// I AM NOT DONE
#[derive(Debug)] #[derive(Debug)]
struct Package { struct Package {
sender_country: String, sender_country: String,
@ -17,6 +15,7 @@ impl Package {
fn new(sender_country: String, recipient_country: String, weight_in_grams: i32) -> Package { fn new(sender_country: String, recipient_country: String, weight_in_grams: i32) -> Package {
if weight_in_grams <= 0 { if weight_in_grams <= 0 {
// panic statement goes here... // panic statement goes here...
panic!("Weight cannot be negative.");
} else { } else {
Package { Package {
sender_country, sender_country,
@ -26,12 +25,14 @@ impl Package {
} }
} }
fn is_international(&self) -> ??? { fn is_international(&self) -> bool {
// Something goes here... // Something goes here...
self.sender_country != self.recipient_country
} }
fn get_fees(&self, cents_per_gram: i32) -> ??? { fn get_fees(&self, cents_per_gram: i32) -> i32 {
// Something goes here... // Something goes here...
cents_per_gram * self.weight_in_grams
} }
} }