Sha256: 897583634fd288d7094f49f99f935c07e58eb185a31cb7148b0173b07729bd8d
Contents?: true
Size: 747 Bytes
Versions: 306
Compression:
Stored size: 747 Bytes
Contents
use std::ascii::AsciiExt;
fn ascii(ch: char) -> u8 {
ch as u8
}
fn get_transpose(ch: char) -> char {
if ch.is_digit(10) {
ch
} else {
(ascii('z') - ascii(ch) + ascii('a')) as char
}
}
pub fn encode(plaintext: &str) -> String {
plaintext
.to_lowercase()
.chars()
.filter(|&ch| ch.is_ascii())
.filter(|&ch| ch.is_alphanumeric())
.map(|ch| get_transpose(ch))
.collect::<Vec<char>>()
.chunks(5)
.map(|slice| slice.iter().cloned().collect::<String>())
.collect::<Vec<String>>()
.join(" ")
}
pub fn decode(ciphertext: &str) -> String {
ciphertext
.split::<char>(' ')
.collect::<String>()
.chars()
.map(|ch| get_transpose(ch))
.collect::<String>()
}
Version data entries
306 entries across 306 versions & 1 rubygems