ju-tcs-rust-23-23 0.1.0

prawa strona tablicy
Documentation 
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use std::{path::Path, fs::File};
use std::io::{self,BufRead};

pub fn head(path: &Path, n: usize) -> Vec<String> {
    let file = File::open(path);
    let lines = io::BufReader::new(file.unwrap()).lines();
    
    let mut res: Vec<String> = vec![];
    let mut i = n;
    for line in lines {
        if i == 0 { break; }
        
        res.push(line.unwrap());
        i -= 1;
    }

    res
}

pub fn tail(path: &Path, n: usize) -> Vec<String> {
    let file = File::open(path);
    let mut lines: Vec<Result<String,std::io::Error>> = io::BufReader::new(file.unwrap()).lines().collect();
    lines.reverse();

    let mut res: Vec<String> = vec![];
    let mut i = n;
    for line in lines {
        if i == 0 { break; }
        
        res.push( line.unwrap() );

        i-=1;
    }

    res.reverse();
    res
}


#[cfg(test)]
mod tests {
    #[test]
    fn test_math() {
        assert_eq!(1 + 2, 3);
    }
}