Complete day 5.2

day-4/.gitignore

@@ -1 +0,0 @@
-/target/

day-4/Cargo.lock

@@ -1,78 +0,0 @@
-# This file is automatically @generated by Cargo.
-# It is not intended for manual editing.
-[[package]]
-name = "day-4"
-version = "0.1.0"
-dependencies = [
- "indoc",
-]
-
-[[package]]
-name = "indoc"
-version = "0.3.6"
-source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "47741a8bc60fb26eb8d6e0238bbb26d8575ff623fdc97b1a2c00c050b9684ed8"
-dependencies = [
- "indoc-impl",
- "proc-macro-hack",
-]
-
-[[package]]
-name = "indoc-impl"
-version = "0.3.6"
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-checksum = "ce046d161f000fffde5f432a0d034d0341dc152643b2598ed5bfce44c4f3a8f0"
-dependencies = [
- "proc-macro-hack",
- "proc-macro2",
- "quote",
- "syn",
- "unindent",
-]
-
-[[package]]
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- "unicode-xid",
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day-4/Cargo.toml

@@ -1,10 +0,0 @@
-[package]
-name = "day-4"
-version = "0.1.0"
-authors = ["Tristan Daniël Maat <tm@tlater.net>"]
-edition = "2018"
-
-# See more keys and their definitions at https://doc.rust-lang.org/cargo/reference/manifest.html
-
-[dependencies]
-indoc = "0.3"

day-4/src/main.rs

@@ -1,122 +0,0 @@
-use std::collections::HashMap;
-use std::fs;
-
-fn main() -> Result<(), Box<dyn std::error::Error>> {
-    let input = fs::read_to_string("input")?;
-    let passports = parse_passports(&input)?;
-    println!("{}", validate_passports(&passports));
-
-    Ok(())
-}
-
-fn parse_passports(input: &str) -> Result<Vec<HashMap<&str, &str>>, &str> {
-    input
-        .split("\n\n")
-        .map(|passport| {
-            passport
-                .trim()
-                .split(|c| c == ' ' || c == '\n')
-                .map(|field| {
-                    let split = field
-                        .find(':')
-                        .ok_or("Invalid passport entry; no separator")?;
-                    let item = field.split_at(split);
-
-                    let key = item.0;
-                    let value = item
-                        .1
-                        .strip_prefix(":")
-                        .expect("We've already checked the separator exists");
-
-                    Ok((key, value))
-                })
-                .collect()
-        })
-        .collect()
-}
-
-fn validate_passports(passports: &Vec<HashMap<&str, &str>>) -> usize {
-    let required_fields = ["byr", "iyr", "eyr", "hgt", "hcl", "ecl", "pid"];
-    let rules = [
-        |year: &str| match year.parse() {
-            Ok(1920..=2002) => true,
-            _ => false,
-        },
-        |year: &str| match year.parse() {
-            Ok(2010..=2020) => true,
-            _ => false,
-        },
-        |year: &str| match year.parse() {
-            Ok(2020..=2030) => true,
-            _ => false,
-        },
-        |height: &str| match height.split_at(height.chars().count() - 2) {
-            (height, "cm") => match height.parse() {
-                Ok(150..=193) => true,
-                _ => false,
-            },
-            (height, "in") => match height.parse() {
-                Ok(59..=76) => true,
-                _ => false,
-            },
-            _ => false,
-        },
-        |color: &str| match color.split_at(1) {
-            ("#", code) => code.chars().all(|a| char::is_ascii_hexdigit(&a)),
-            _ => false,
-        },
-        |color: &str| {
-            ["amb", "blu", "brn", "gry", "grn", "hzl", "oth"]
-                .iter()
-                .any(|c| c == &color)
-        },
-        |pid: &str| pid.chars().count() == 9 && pid.chars().all(char::is_numeric),
-    ];
-
-    passports
-        .iter()
-        .filter(|passport| {
-            required_fields
-                .iter()
-                .zip(rules.iter())
-                .all(|(field, rule)| {
-                    if let Some(value) = passport.get(field) {
-                        rule(value)
-                    } else {
-                        false
-                    }
-                })
-        })
-        .count()
-}
-
-#[cfg(test)]
-mod tests {
-    use super::*;
-    use indoc::indoc;
-
-    #[test]
-    fn test_simple() -> Result<(), String> {
-        let example = indoc!(
-            "ecl:gry pid:860033327 eyr:2020 hcl:#fffffd
-             byr:1937 iyr:2017 cid:147 hgt:183cm
-
-             iyr:2013 ecl:amb cid:350 eyr:2023 pid:028048884
-             hcl:#cfa07d byr:1929
-
-             hcl:#ae17e1 iyr:2013
-             eyr:2024
-             ecl:brn pid:760753108 byr:1931
-             hgt:179cm
-
-             hcl:#cfa07d eyr:2025 pid:166559648
-             iyr:2011 ecl:brn hgt:59in
-             "
-        );
-
-        let passports = parse_passports(example)?;
-        assert_eq!(validate_passports(&passports), 2);
-
-        Ok(())
-    }
-}