Soundex: Difference between revisions
rust example
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O'Mally soundex:O054
d jay soundex:D200</pre>
=={{header|Rust}}==
<syntaxhighlight lang="rust">use std::ops::Deref;
use regex::Regex;
use once_cell::sync::Lazy;
pub trait Soundex {
fn soundex(&self) -> String;
}
fn soundex_match(c: char) -> char {
return match c.to_ascii_lowercase() {
'b' | 'f' | 'p' | 'v' => Some('1'),
'c' | 'g' | 'j' | 'k' | 'q' | 's' | 'x' | 'z' => Some('2'),
'd' | 't' => Some('3'),
'l' => Some('4'),
'm' | 'n' => Some('5'),
'r' => Some('6'),
_ => Some('0'),
}.unwrap();
}
static RE: Lazy<Regex> = Lazy::new(|| {Regex::new("[^a-zA-Z]").unwrap()});
impl<T: Deref<Target = str>> Soundex for T {
fn soundex(&self) -> String {
let s = RE.replace(self, "").chars().collect::<Vec<char>>();
if s.len() == 0 {
return String::new();
}
let mut a = vec![s[0].to_ascii_uppercase(); 1].to_vec();
let mut last_sdex = soundex_match(a[0]);
let mut hadvowel = false;
for ch in &s[1..s.len()] {
let lc_ch = ch.to_ascii_lowercase();
let sdex = soundex_match(lc_ch);
if sdex != '0' {
if sdex != last_sdex || hadvowel {
a.push(sdex);
last_sdex = sdex;
hadvowel = false
}
}
else if "aeiouy".contains(lc_ch) {
hadvowel = true;
}
}
if a.len() < 4 {
for _ in 0..(5 - a.len()) {
a.push('0');
}
}
return a[0..4].into_iter().collect();
}
}
fn main() {
assert_eq!("Ascroft".soundex(), "A261".to_string());
assert_eq!("Euler".soundex(), "E460".to_string());
assert_eq!("Gausss".soundex(), "G200".to_string());
assert_eq!("Hilbert".soundex(), "H416".to_string());
assert_eq!("Knuth".soundex(), "K530".to_string());
assert_eq!("Lloyd".soundex(), "L300".to_string());
assert_eq!("Lukasiewicz".soundex(), "L222".to_string());
assert_eq!("Ellery".soundex(), "E460".to_string());
assert_eq!("Ghosh".soundex(), "G200".to_string());
assert_eq!("Heilbronn".soundex(), "H416".to_string());
assert_eq!("Kant".soundex(), "K530".to_string());
assert_eq!("Ladd".soundex(), "L300".to_string());
assert_eq!("Lissajous".soundex(), "L222".to_string());
assert_eq!("Wheaton".soundex(), "W350".to_string());
assert_eq!("Ashcraft".soundex(), "A261".to_string());
assert_eq!("Burroughs".soundex(), "B620".to_string());
assert_eq!("Burrows".soundex(), "B620".to_string());
assert_eq!("O'Hara".soundex(), "O600".to_string());
}
</syntaxhighlight>
=={{header|Scala}}==
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