yfunc_rust/
func.rs

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use std::{collections::HashSet, hash::Hash, io::Write};
use crate::prelude::*;

pub trait Unique {
    fn unique(&self) -> Self;
}

impl<T> Unique for Vec<T> where T: Eq+Hash+Clone {

    fn unique(&self) -> Self {
        let mut appear: HashSet<T> = HashSet::new();
        let mut ret: Vec<T> = vec![];
        for x in self {
            if !appear.contains(x) {
                ret.push(x.clone());
                appear.insert(x.clone());
            }
        }
        ret
    }

}

pub trait VariableFormat {
    fn Aabb(&self) -> String;
}

impl VariableFormat for String {

    fn Aabb(&self) -> String {
        let mut c = self.chars();
        match c.next() {
            Some(first_char) => first_char.to_uppercase().collect::<String>() + c.as_str().to_lowercase().as_str(),
            None => String::new(),
        }
    }

}

pub fn write_str_to_stdout(s: &str) -> YRes<()> {
    write!(std::io::stdout(), "{}", s).map_err(|e|
        err!(IOError::"write str to stdout", s, e)
    )?;
    std::io::stdout().flush().map_err(|e|
        err!(IOError::"flush stdout", s, e)
    )?;
    Ok(())
}

pub fn write_bytes_to_stdout(b: &Vec<u8>) -> YRes<()> {
    std::io::stdout().write_all(&b).map_err(|e|
        err!(IOError::"write bytes to stdout", e)
    )?;
    std::io::stdout().flush().map_err(|e|
        err!(IOError::"flush stdout", e)
    )?;
    Ok(())
}