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Rosetta Code/Find bare lang tags: Difference between revisions
Add Rust implementation
(Add Rust implementation) |
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1 in PHP (["Greatest_subsequential_sum"])
</pre>
=={{header|Rust}}==
<lang rust>
extern crate regex;
use std::io;
use std::io::prelude::*;
use regex::Regex;
fn find_bare_lang_tags(input: &str) -> Vec<(Option<String>, i32)> {
let mut language_pairs = vec![];
let mut language = None;
let mut counter = 0_i32;
let header_re = Regex::new(r"==\{\{header\|(?P<lang>[[:alpha:]]+)\}\}==").unwrap();
for line in input.lines() {
if let Some(captures) = header_re.captures(line) {
if let Some(header_lang) = captures.name("lang") {
language_pairs.push((language, counter));
language = Some(header_lang.as_str().to_owned());
counter = 0;
}
}
if line.contains("<lang>") {
counter += 1;
}
}
language_pairs.push((language, counter));
language_pairs
}
fn main() {
let stdin = io::stdin();
let mut buf = String::new();
stdin.lock().read_to_string(&mut buf).unwrap();
let results = find_bare_lang_tags(&buf);
let total_bare = results.iter().map(|r| r.1).sum::<i32>();
println!("{} bare language tags.\n", total_bare);
for result in &results {
let num_bare = result.1;
if num_bare > 0 {
println!(
"{} in {}",
result.1,
result
.0
.to_owned()
.unwrap_or_else(|| String::from("no language"))
);
}
}
}
</lang>
{{out}}
<pre>
</pre>
=={{header|Scala}}==
To analyse RosettaCode pages, invoke Java with <code>-Dhttp.agent=Anything</code> to work around CloudFlare blocking Java from accessing the RosettaCode site.
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