Created
October 18, 2020 07:59
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word count
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| [package] | |
| name = "wc" | |
| version = "0.1.0" | |
| edition = "2018" | |
| [dependencies] | |
| regex = "1" | |
| lazy_static = "1" |
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| use std::collections::HashMap; | |
| use std::fs; | |
| use std::io::{self, BufRead}; | |
| use regex::Regex; | |
| lazy_static::lazy_static! { | |
| static ref WORD_REGEX: Regex = Regex::new(r"(?i)[a-z]{2,}").unwrap(); | |
| static ref FNAME_REGEX: Regex = Regex::new(r"(?i)\.txt$").unwrap(); | |
| } | |
| fn main() -> io::Result<()> { | |
| let mut word_counts = HashMap::new(); | |
| for path in fs::read_dir(".")? | |
| .filter_map(|p| p.ok()) | |
| .map(|p| p.path()) | |
| .filter(|p| p.is_file() && FNAME_REGEX.is_match(&p.to_string_lossy())) { | |
| let file = fs::File::open(path)?; | |
| for line in io::BufReader::new(file).lines() { | |
| for cap in WORD_REGEX.captures_iter(&line?) { | |
| *word_counts.entry(cap[0].to_string()).or_insert(0) += 1u32; | |
| } | |
| } | |
| } | |
| let mut word_array: Vec<(String, u32)> = word_counts.into_iter().collect(); | |
| word_array.sort_by(|a, b| b.1.partial_cmp(&a.1).unwrap()); | |
| let final_size = std::cmp::min(word_array.len(), 10); | |
| for entry in &word_array[..final_size] { | |
| println!("{} {}", entry.1, entry.0); | |
| } | |
| Ok(()) | |
| } |
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