day 3 part 2, copy into

2024/day3/part2/src/main.rs

@@ -0,0 +1,48 @@
+use regex::Regex;
+use std::fs::read_to_string;
+
+fn main() {
+    let lines: Vec<String> = read_to_string("input.txt")
+        .unwrap()
+        .lines()
+        .map(String::from)
+        .collect();
+    let pattern1 = Regex::new(r"mul\((\d+,\d+)\)").unwrap();
+    let pattern2 = Regex::new(r"mul\((\d+)\,(\d+)\)").unwrap();
+
+    let mut finalvec1 = mul_parse(lines, pattern1);
+    let finalint = mul_process(finalvec1,pattern2);
+    println!("{:?}",finalint)
+}
+
+
+fn mul_parse(thelines: Vec<String>, pattern: Regex) -> Vec<String>{
+    let mut mulvec: Vec<String> = Vec::new();
+    for i in thelines {
+        let tempvec: Vec<String> =
+            pattern.find_iter(&i)
+                .filter_map(|fr| fr.as_str().parse::<String>().ok()).collect();
+
+        for i2 in tempvec {
+            mulvec.push(i2);
+        }
+
+    }
+    mulvec
+
+}
+
+fn mul_process(mulvec: Vec<String>, pattern: Regex) -> i64 {
+    let mut mulint: i64 = 0;
+    for i in mulvec {
+        let captures = pattern.captures(&i).unwrap();
+        let capture1 = captures.get(1).unwrap().as_str().parse::<i32>().unwrap();
+
+        let capture2 = captures.get(2).unwrap().as_str().parse::<i32>().unwrap();
+        mulint += (capture1 * capture2) as i64;
+    }
+
+
+    mulint
+
+}