Fixed missing semicolon, spelling mistakes, and capitalization in borrowing

This commit is contained in:
Tanish-Eagle 2022-04-07 15:22:02 +05:30
parent c74612b6a8
commit 917f5e92d2
1 changed files with 27 additions and 27 deletions

View File

@ -6,10 +6,10 @@
fn main() {
let x = 5;
// fill the blank
// Fill the blank
let p = __;
println!("the memory address of x is {:p}", p); // one possible output: 0x16fa3ac84
println!("the memory address of x is {:p}", p); // One possible output: 0x16fa3ac84
}
```
@ -20,23 +20,23 @@ fn main() {
let x = 5;
let y = &x;
// modify this line only
// Modify this line only
assert_eq!(5, y);
println!("Success!")
println!("Success!");
}
```
3. 🌟
```rust,editable
// fix error
// Fix error
fn main() {
let mut s = String::from("hello, ");
borrow_object(s);
println!("Success!")
println!("Success!");
}
fn borrow_object(s: &String) {}
@ -45,13 +45,13 @@ fn borrow_object(s: &String) {}
4. 🌟
```rust,editable
// fix error
// Fix error
fn main() {
let mut s = String::from("hello, ");
push_str(s);
println!("Success!")
println!("Success!");
}
fn push_str(s: &mut String) {
@ -65,16 +65,16 @@ fn push_str(s: &mut String) {
fn main() {
let mut s = String::from("hello, ");
// fill the blank to make it work
// Fill the blank to make it work
let p = __;
p.push_str("world");
println!("Success!")
println!("Success!");
}
```
#### ref
#### Ref
`ref` can be used to take references to a value, similar to `&`.
6. 🌟🌟🌟
@ -84,18 +84,18 @@ fn main() {
let c = 'δΈ­';
let r1 = &c;
// fill the blank,dont change other code
// Fill the blank,dont change other code
let __ r2 = c;
assert_eq!(*r1, *r2);
// check the equality of the two address strings
// Check the equality of the two address strings
assert_eq!(get_addr(r1),get_addr(r2));
println!("Success!")
println!("Success!");
}
// get memory address string
// Get memory address string
fn get_addr(r: &char) -> String {
format!("{:p}", r)
}
@ -105,8 +105,8 @@ fn get_addr(r: &char) -> String {
7. 🌟
```rust,editable
// remove something to make it work
// don't remove a whole line !
// Remove something to make it work
// Don't remove a whole line !
fn main() {
let mut s = String::from("hello");
@ -115,21 +115,21 @@ fn main() {
println!("{}, {}", r1, r2);
println!("Success!")
println!("Success!");
}
```
#### Mutablity
8. 🌟 Error: Borrow a immutable object as mutable
#### Mutability
8. 🌟 Error: Borrow an immutable object as mutable
```rust,editable
fn main() {
//fix error by modifying this line
// Fix error by modifying this line
let s = String::from("hello, ");
borrow_object(&mut s);
println!("Success!")
println!("Success!");
}
fn borrow_object(s: &mut String) {}
@ -138,7 +138,7 @@ fn borrow_object(s: &mut String) {}
9. 🌟🌟 Ok: Borrow a mutable object as immutable
```rust,editable
// this code has no errors!
// This code has no errors!
fn main() {
let mut s = String::from("hello, ");
@ -146,7 +146,7 @@ fn main() {
s.push_str("world");
println!("Success!")
println!("Success!");
}
fn borrow_object(s: &String) {}
@ -156,7 +156,7 @@ fn borrow_object(s: &String) {}
10. 🌟🌟
```rust,editable
// comment one line to make it work
// Comment one line to make it work
fn main() {
let mut s = String::from("hello, ");
@ -178,8 +178,8 @@ fn main() {
let r1 = &mut s;
let r2 = &mut s;
// add one line below to make a compiler error: cannot borrow `s` as mutable more than once at a time
// you can't use r1 and r2 at the same time
// Add one line below to make a compiler error: cannot borrow `s` as mutable more than once at a time
// You can't use r1 and r2 at the same time
}
```