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

Dependencies

• [2] XDEY7SNL 31: Improve solution for Rust track exercise "Raindrops".
• [3] SGDHLMNR 27: Improve solution for Rust track exercise "Raindrops".
• [4] WQIAT4H6 9: Improve solution for Rust track exercise "Raindrops".
• [5] N3POGH26 7: Add solution for Rust track exercise "Raindrops".
• [6] MSFESBT6 6: Add Rust track exercise "Raindrops".
• [7] MBAFQOWX 8: Improve solution for Rust track exercise "Raindrops".
• [8] QGB53CNE 14: Improve solution for Rust track exercise "Raindrops".

Change contents

• replacement in rust/raindrops/src/lib.rs at line 2
  [2.27]→[2.27:99](∅→∅)
  − const FACTORS_VOWELS: &[(u32, &str)] = &[(3, "i"), (5, "a"), (7, "o")];
  [2.27]

  [2.99]
  + const FACTORS_VOWELS: [(u32, char); 3] = [(3, 'i'), (5, 'a'), (7, 'o')];
• replacement in rust/raindrops/src/lib.rs at line 4
  [2.126]→[2.126:242](∅→∅)
  − const MAX_STRING_LENGTH: usize =

  − (PREFIX.len() + FACTORS_VOWELS[0].1.len() + SUFFIX.len()) * FACTORS_VOWELS.len();
  [2.126]

  [2.242]
  + const MAX_STRING_LENGTH: usize = (PREFIX.len() + 1 + SUFFIX.len()) * FACTORS_VOWELS.len();
• edit in rust/raindrops/src/lib.rs at line 7
  [3.1819]→[2.244:604](∅→∅),[3.28]→[3.1046:1047](∅→∅),[3.42]→[3.1046:1047](∅→∅),[3.50]→[3.1046:1047](∅→∅),[3.74]→[3.1046:1047](∅→∅),[2.604]→[3.1046:1047](∅→∅),[3.1046]→[3.1046:1047](∅→∅)
  − // 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 9
  [2.663]→[2.663:715](∅→∅)
  − FACTORS_VOWELS.iter().for_each(|(factor, vowel)| {
  [2.663]

  [2.715]
  + FACTORS_VOWELS.iter().for_each(|&(factor, vowel)| {
• replacement in rust/raindrops/src/lib.rs at line 12
  [2.767]→[2.767:791](∅→∅)
  − out.push_str(vowel);
  [2.767]

  [2.791]
  + out.push(vowel);