initial commit

src/lib.rs

@@ -0,0 +1,24 @@
+/// Get plural string `s` match number `n`
+///
+/// ## Example
+/// ``` rust
+/// use plurify::ns;
+///
+/// let en = &["cat", "cats", "cats"];
+/// let uk = &["кіт", "кота", "котів"];
+///
+/// assert_eq!(ns(1, en), "cat");
+/// assert_eq!(ns(2, en), "cats");
+/// assert_eq!(ns(5, en), "cats");
+///
+/// assert_eq!(ns(1, uk), "кіт");
+/// assert_eq!(ns(2, uk), "кота");
+/// assert_eq!(ns(5, uk), "котів");
+/// ```
+pub fn ns<'a>(n: usize, s: &[&'a str]) -> &'a str {
+    s[if (n % 100) > 4 && (n % 100) < 20 {
+        2
+    } else {
+        [2, 0, 1, 1, 1, 2][std::cmp::min(n % 10, 5)]
+    }]
+}