chore: reorg

__misc/regex/src/main.rs

@@ -0,0 +1,40 @@
+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());
+    }
+}