roman_encoder 1.0.2

Encode unicode string into roman numerals
Documentation 
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40

pub mod roman {
  pub trait Roman {
    /// Encodes unicode string into roman numerals
    /// # Examples
    /// ```
    /// println!("Hello, world! : {}", "Hello, world!".roman())
    /// /* LXXII CI CVIII CVIII CXI XLIV XXXII CXIX CXI CXIV CVIII C XXXIII */
    /// ```
    fn roman(&self) -> String;
    // TODO: unroman(&self) -> String
  }

  impl Roman for &str {
    fn roman(&self) -> String {
      let mut ord:               i64;
      let mut min_ord:        String = String::new();
      let mut encoded:   Vec<String> = Vec::new();
      let alphabet: Vec<(&str, i64)> =
          vec![("M", 1000), ("CM", 900),
               ("D",  500), ("CD", 400),
               ("C",  100), ("XC",  90),
               ("L",   50), ("XL",  40),
               ("X",   10), ("IX",   9),
               ("V",    5), ("IV",   4),
               ("I",    1)];
      for c in self.chars() {
        ord = c as i64;
        for (symbol, value) in &alphabet {
          while value <= &ord {
            min_ord += symbol;
            ord     -= value;
          }
        }
        encoded.push(min_ord);
        min_ord = String::new();
      }
      return encoded.join(" ");
    }
  }
}