55 lines
1.5 KiB
Rust
55 lines
1.5 KiB
Rust
use once_cell::sync::Lazy;
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use std::collections::HashMap;
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#[rustfmt::skip]
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pub static NATO: Lazy<HashMap<char, &'static str>> = Lazy::new(|| {
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[
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('A', "Alfa"), ('B', "Bravo"), ('C', "Charlie"), ('D', "Delta"),
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('E', "Echo"), ('F', "Foxtrot"), ('G', "Golf"), ('H', "Hotel"),
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('I', "India"), ('J', "Juliett"), ('K', "Kilo"), ('L', "Lima"),
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('M', "Mike"), ('N', "November"), ('O', "Oscar"), ('P', "Papa"),
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('Q', "Quebec"), ('R', "Romeo"), ('S', "Sierra"), ('T', "Tango"),
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('U', "Uniform"), ('V', "Victor"), ('W', "Whiskey"), ('X', "Xray"),
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('Y', "Yankee"), ('Z', "Zulu"),
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]
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.iter()
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.copied()
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.collect()
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});
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fn to_nato(words: &str) -> String {
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words
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.to_uppercase()
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.chars()
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.filter(|c| !c.is_whitespace())
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.map(|c| match NATO.get(&c) {
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Some(w) => w.to_string(),
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None => c.to_string(),
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})
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.collect::<Vec<_>>()
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.join(" ")
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}
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#[cfg(test)]
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mod tests {
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use super::to_nato;
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#[test]
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fn base_to_nato() {
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assert_eq!(
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to_nato("If you can read"),
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"India Foxtrot Yankee Oscar Uniform Charlie Alfa November Romeo Echo Alfa Delta"
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);
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assert_eq!(
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to_nato("Did not see that coming",),
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"Delta India Delta November Oscar Tango Sierra Echo Echo Tango Hotel Alfa Tango Charlie Oscar Mike India November Golf"
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);
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assert_eq!(
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to_nato("go for it!"),
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"Golf Oscar Foxtrot Oscar Romeo India Tango !"
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);
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}
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}
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