1.2 correct.

Author: jfgoog

aoc01/src/main.rs

@@ -1,18 +1,69 @@
-fn main() {
+fn find_patterns(lines: &Vec<String>, patterns: &Vec<(&str, i32)>) -> i32 {
     let mut sum = 0;
-    for line in std::io::stdin().lines() {
-        let mut first = None;
+    for line in lines {
+        let mut firstoffset = None;
+        let mut lastoffset = None;
+        let mut first = 0;
         let mut last = 0;
-        for c in line.unwrap().bytes() {
-            if !c.is_ascii_digit() {
-                continue;
+        for (pat, val) in patterns.iter() {
+            if let Some(offset) = line.find(pat) {
+                if firstoffset.is_none() || offset < firstoffset.unwrap() {
+                    firstoffset = Some(offset);
+                    first = *val;
+                }
             }
-            if first.is_none() {
-                first = Some((c - b'0') as u32);
+            if let Some(offset) = line.rfind(pat) {
+                if lastoffset.is_none() || offset > lastoffset.unwrap() {
+                    lastoffset = Some(offset);
+                    last = *val;
+                }
             }
-            last = (c - b'0') as u32;
         }
-        sum += 10 * first.unwrap() + last;
+        sum += 10 * first + last;
     }
-    println!("{}", sum);
+    sum
+}
+
+fn main() {
+    let lines = std::io::stdin()
+        .lines()
+        .map(|r| r.unwrap())
+        .collect::<Vec<_>>();
+
+    let patterns = vec![
+        ("0", 0),
+        ("1", 1),
+        ("2", 2),
+        ("3", 3),
+        ("4", 4),
+        ("5", 5),
+        ("6", 6),
+        ("7", 7),
+        ("8", 8),
+        ("9", 9),
+    ];
+    println!("Part 1: {}", find_patterns(&lines, &patterns));
+    let patterns = vec![
+        ("0", 0),
+        ("1", 1),
+        ("2", 2),
+        ("3", 3),
+        ("4", 4),
+        ("5", 5),
+        ("6", 6),
+        ("7", 7),
+        ("8", 8),
+        ("9", 9),
+        ("zero", 0),
+        ("one", 1),
+        ("two", 2),
+        ("three", 3),
+        ("four", 4),
+        ("five", 5),
+        ("six", 6),
+        ("seven", 7),
+        ("eight", 8),
+        ("nine", 9),
+    ];
+    println!("Part 2: {}", find_patterns(&lines, &patterns));
 }