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Hatter Jiang
2020-10-17 12:03:44 +08:00
parent bf1a0343cc
commit 004599c8e4
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58
__misc/regex/Cargo.lock generated Normal file
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# It is not intended for manual editing.
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13
__misc/regex/Cargo.toml Normal file
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[package]
name = "regex"
version = "0.1.0"
authors = ["Hatter Jiang <jht5945@gmail.com>"]
edition = "2018"
# See more keys and their definitions at https://doc.rust-lang.org/cargo/reference/manifest.html
[dependencies]
regex = "1.3.1"

40
__misc/regex/src/main.rs Normal file
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use regex::Regex;
const TO_SEARCH: &str = "
On 2010-03-14, foo happened. On 2014-10-14, bar happened.
";
fn main() {
let re = Regex::new(r"(\d{4})-(\d{2})-(\d{2})").unwrap();
// year: 2010, month: 03, day: 14
// year: 2014, month: 10, day: 14
for caps in re.captures_iter(TO_SEARCH) {
println!("year: {}, month: {}, day: {}",
caps.get(1).unwrap().as_str(),
caps.get(2).unwrap().as_str(),
caps.get(3).unwrap().as_str());
}
let re2 = Regex::new(r"(\d+)").unwrap();
println!("{}", re2.replace_all("Hello 100, 200", | caps: &regex::Captures | {
"(".to_owned() + &(caps[1].parse::<usize>().unwrap() * 2).to_string() + ")"
}));
println!("{}", re2.replace_all("Hello 100, 200", | caps: &regex::Captures<'_> | {
"[".to_owned() + &caps[1] + "]"
}));
let re3 = Regex::new(r"(?P<x>\d+)").unwrap();
println!("{}", re3.replace_all("Hello 100, 200", "<$x>"));
let e = "name@example.com";
let re_e = Regex::new(r"^(\w+)@((\w+)*\.com)$").unwrap();
// name -> name
// domain -> example.com
// domain -> example
for cap in re_e.captures_iter(e) {
println!("name -> {}", cap.get(1).unwrap().as_str());
println!("domain -> {}", cap.get(2).unwrap().as_str());
println!("domain -> {}", cap.get(3).unwrap().as_str());
}
}