porting over AOC from previous years to a monorepo.

2023/days/01/src/parse.rs

@@ -0,0 +1,77 @@
+static REPLACEMENT_STRINGS: [(&str, &str); 10] = [
+    ("zero", "zero0zero"),
+    ("one", "one1one"),
+    ("two", "two2two"),
+    ("three", "three3three"),
+    ("four", "four4four"),
+    ("five", "five5five"),
+    ("six", "six6six"),
+    ("seven", "seven7seven"),
+    ("eight", "eight8eight"),
+    ("nine", "nine9nine"),
+];
+
+pub fn parse_english(input: &str) -> Vec<Vec<char>> {
+    input
+        .to_string()
+        .lines()
+        .map(|l| {
+            let mut ret = l.to_string();
+            for (string, replacement) in REPLACEMENT_STRINGS.iter() {
+                ret = ret.replace(string, replacement)
+            }
+            ret
+        })
+        .map(|l| l.chars().filter(|c| c.is_ascii_digit()).collect())
+        .collect()
+}
+
+pub fn parse(input: &str) -> Vec<Vec<char>> {
+    input
+        .lines()
+        .map(|l| l.chars().filter(|c| c.is_ascii_digit()).collect())
+        .collect()
+}
+
+#[cfg(test)]
+mod tests {
+    use super::*;
+
+    #[test]
+    fn test_parse() {
+        let input = concat!("1abc2\n", "pqr3stu8vwx\n", "a1b2c3d4e5f\n", "treb7uchet\n",);
+        assert_eq!(
+            parse(input),
+            vec![
+                vec!['1', '2',],
+                vec!['3', '8',],
+                vec!['1', '2', '3', '4', '5'],
+                vec!['7']
+            ]
+        );
+    }
+    #[test]
+    fn test_english() {
+        let input = concat!(
+            "two1nine\n",
+            "eightwothree\n",
+            "abcone2threexyz\n",
+            "xtwone3four\n",
+            "4nineeightseven2\n",
+            "zoneight234\n",
+            "7pqrstsixteen\n",
+        );
+        assert_eq!(
+            parse_english(input),
+            vec![
+                vec!['2', '1', '9',],
+                vec!['8', '2', '3',],
+                vec!['1', '2', '3',],
+                vec!['2', '1', '3', '4'],
+                vec!['4', '9', '8', '7', '2'],
+                vec!['1', '8', '2', '3', '4'],
+                vec!['7', '6'],
+            ]
+        );
+    }
+}