Решение на упр.02 задача 3 от Симеон Георгиев

Обратно към всички решения

Към профила на Симеон Георгиев

Код

fn split_string_at(s: String, n : usize) -> (String, String) {

let mut s1 = String::with_capacity(n);

s1.push_str(&s[..n]);

let mut s2 = String::with_capacity(s.len() - n);

s2.push_str(&s[n..]);

(s1, s2)

}

fn split_slice_at(s: &str, n: usize) -> (&str, &str) {

(&s[..n], &s[n..])

}

fn split_slice_mut_at(s : &mut str, n : usize) -> (&str, &str) {

(&s[..n], &s[n..])

}

fn main() {

let s = String::from("Why am I writing this now?");

let (sl1, sl2) = split_slice_at(&s, 6);

println!("{},{}", sl1, sl2);

let (s1, s2) = split_string_at(s, 5);

println!("{},{}", s1, s2);

let mut s2 = String::from("Im trying");

let (s21, s22) = split_slice_mut_at(&mut s2, 3); // proof by example

println!("{},{}", s21, s22);

}

Лог от изпълнението

Updating crates.io index
     Locking 17 packages to latest compatible versions
   Compiling proc-macro2 v1.0.102
   Compiling unicode-ident v1.0.20
   Compiling quote v1.0.41
   Compiling futures-core v0.3.31
   Compiling futures-sink v0.3.31
   Compiling futures-channel v0.3.31
   Compiling slab v0.4.11
   Compiling syn v2.0.108
   Compiling futures-io v0.3.31
   Compiling pin-project-lite v0.2.16
   Compiling futures-task v0.3.31
   Compiling memchr v2.7.6
   Compiling pin-utils v0.1.0
   Compiling solution v0.1.0 (/tmp/d20251023-1757769-11cfp1m/solution)
warning: function `split_string_at` is never used
 --> src/lib.rs:1:4
  |
1 | fn split_string_at(s: String, n : usize) -> (String, String) {
  |    ^^^^^^^^^^^^^^^
  |
  = note: `#[warn(dead_code)]` on by default

warning: function `split_slice_at` is never used
 --> src/lib.rs:9:4
  |
9 | fn split_slice_at(s: &str, n: usize) -> (&str, &str) {
  |    ^^^^^^^^^^^^^^

warning: function `split_slice_mut_at` is never used
  --> src/lib.rs:13:4
   |
13 | fn split_slice_mut_at(s : &mut str, n : usize) -> (&str, &str) {
   |    ^^^^^^^^^^^^^^^^^^

warning: function `main` is never used
  --> src/lib.rs:17:4
   |
17 | fn main() {
   |    ^^^^

warning: `solution` (lib) generated 4 warnings
   Compiling futures-macro v0.3.31
   Compiling futures-util v0.3.31
   Compiling futures-executor v0.3.31
   Compiling futures v0.3.31
warning: function `split_slice_mut_at` is never used
  --> tests/../src/lib.rs:13:4
   |
13 | fn split_slice_mut_at(s : &mut str, n : usize) -> (&str, &str) {
   |    ^^^^^^^^^^^^^^^^^^
   |
   = note: `#[warn(dead_code)]` on by default

warning: function `main` is never used
  --> tests/../src/lib.rs:17:4
   |
17 | fn main() {
   |    ^^^^

warning: `solution` (test "solution_test") generated 2 warnings
    Finished `test` profile [unoptimized + debuginfo] target(s) in 8.25s
     Running tests/solution_test.rs (target/debug/deps/solution_test-fc1324dc0157cdc7)

running 1 test
test solution_test::test_basic ... ok

test result: ok. 1 passed; 0 failed; 0 ignored; 0 measured; 0 filtered out; finished in 0.00s

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