31: Improve solution for Rust track exercise "Raindrops".

[?]

Aaw9nJhsNmfzFih9mKyNw9mV8CgERXJkRa1kK1Kx3LQH

Sep 2, 2021, 9:42 PM

XDEY7SNLZMAC3KIKUHDGZGGXHHT7BYF3GSVAREXESO5D4S6FZBQQC

Dependencies

[2] J3ZPU3R2 28: Add missing semicolon in solution for Rust track exercise "Raindrops".
[3] IXMBS6ZP 29: Improve solution for Rust track exercise "Nth Prime".
[4] N3POGH26 7: Add solution for Rust track exercise "Raindrops".
[5] ERYD4CD7 11: Add solution for Rust track exercise "Nth Prime".
[6] MBAFQOWX 8: Improve solution for Rust track exercise "Raindrops".
[7] MSFESBT6 6: Add Rust track exercise "Raindrops".
[8] SGDHLMNR 27: Improve solution for Rust track exercise "Raindrops".
[9] UTP7D53Q 12: Improve solution for Rust track exercise "Nth Prime".
[10] WQIAT4H6 9: Improve solution for Rust track exercise "Raindrops".
[11] QGB53CNE 14: Improve solution for Rust track exercise "Raindrops".
[*] JZN2AQ3E 10: Add Rust track exercise "nth-prime".

Change contents

edit in rust/raindrops/src/lib.rs at line 1

[4.1781]

[4.1782]

const PREFIX: &str = "Pl";
const FACTORS_VOWELS: &[(u32, &str)] = &[(3, "i"), (5, "a"), (7, "o")];
const SUFFIX: &str = "ng";
const MAX_STRING_LENGTH: usize =
(PREFIX.len() + FACTORS_VOWELS[0].1.len() + SUFFIX.len()) * FACTORS_VOWELS.len();
replacement in rust/raindrops/src/lib.rs at line 8

[4.1819]→[4.0:42](∅→∅)

let mut out = String::with_capacity(15);

[4.1819]

[4.1046]

// Check that the assumption that MAX_STRING_LENGTH is equal to the length of constructing the largest output holds.
debug_assert!(
FACTORS_VOWELS
.iter()
.map(|tuple| PREFIX.len() + tuple.1.len() + SUFFIX.len())
.sum::<usize>()
.eq(&MAX_STRING_LENGTH),
"MAX_STRING_LENGTH is not equal to the length of the largest constructible output."
);
replacement in rust/raindrops/src/lib.rs at line 18

[4.1047]→[4.75:173](∅→∅),[4.173]→[4.43:67](∅→∅),[4.67]→[4.199:224](∅→∅),[4.199]→[4.199:224](∅→∅),[4.224]→[2.0:24](∅→∅),[2.24]→[4.249:260](∅→∅),[4.91]→[4.249:260](∅→∅),[4.249]→[4.249:260](∅→∅)

[(3, "i"), (5, "a"), (7, "o")]
.iter()
.for_each(|(factor, vowel)| {
if n % factor == 0 {
out.push_str("Pl");
out.push_str(vowel);
out.push_str("ng");
}
});

[4.1047]

[4.190]

let mut out = String::with_capacity(MAX_STRING_LENGTH);

FACTORS_VOWELS.iter().for_each(|(factor, vowel)| {
if (n % factor).eq(&0) {
out.push_str(PREFIX);
out.push_str(vowel);
out.push_str(SUFFIX);
}
});
replacement in rust/nth-prime/src/lib.rs at line 43

[4.1291]→[4.1291:1369](∅→∅)

// Might return incorrect value if values greater than u32::MAX are cast.

[4.1291]

[4.1369]

// Might panic if values greater than u32::MAX are cast.
replacement in rust/nth-prime/src/lib.rs at line 59

[3.399]→[3.399:478](∅→∅)

// Might return incorrect value if values greater than u32::MAX are cast.

[3.399]

[3.478]

// Might panic if values greater than u32::MAX are cast.
replacement in rust/nth-prime/src/lib.rs at line 68

[4.124]→[4.124:202](∅→∅)

// Might return incorrect value if values greater than u32::MAX are cast.

[4.124]

[3.549]

// Might panic if values greater than u32::MAX are cast.
replacement in rust/nth-prime/src/lib.rs at line 77

[3.692]→[3.692:771](∅→∅)

// Might return incorrect value if values greater than u32::MAX are cast.

[3.692]

[3.771]

// Might panic if values greater than u32::MAX are cast.