{"header":{"message":"Day 4 solution","description":null,"timestamp":"2020-12-16T23:57:11Z","authors":[{"email":"jeremy.list@youdo.co.nz","name":"Jeremy List"}]},"hash":"RSO3CMWGWGW73HBTR5LZJR5N4KFWDE7WVHN4RAFDQNOYMHSS2KTAC","authors":[],"deps":{"hashes":[["RSO3CMWGWGW73HBTR5LZJR5N4KFWDE7WVHN4RAFDQNOYMHSS2KTAC","Day 4 solution"],["AA",null],["B527MN663VOX7PY6BCLAAU62WDPTI4JTVLNUP2UR74S4KJYKT4HQC","Solve day 1 for 2020"]],"deps":["B527MN663VOX7PY6BCLAAU62WDPTI4JTVLNUP2UR74S4KJYKT4HQC"],"known":[]},"hunks":[{"FileAdd":{"meta":{"basename":"day4.rs","metadata":0},"context":[{"change":2,"pos":17}],"contents":[{"Add":"use std::collections::HashMap;"},{"Add":"use std::env;"},{"Add":""},{"Add":"fn extract_keys>(ln: S) -> HashMap {"},{"Add":" let mut collected = HashMap::new();"},{"Add":" for field in ln.as_ref().split_whitespace() {"},{"Add":" let parts: Vec<_> = field.split(':').collect();"},{"Add":" collected.insert(String::from(parts[0]), String::from(parts[1]));"},{"Add":" };"},{"Add":" collected"},{"Add":"}"},{"Add":""},{"Add":"const REQUIRED: &[(&str, fn(String) -> bool)] ="},{"Add":" &["},{"Add":" (\"byr\", check_byr),"},{"Add":" (\"iyr\", check_iyr),"},{"Add":" (\"eyr\", check_eyr),"},{"Add":" (\"hgt\", check_hgt),"},{"Add":" (\"hcl\", check_hcl),"},{"Add":" (\"ecl\", check_ecl),"},{"Add":" (\"pid\", check_pid)"},{"Add":" ];"},{"Add":""},{"Add":"fn check_byr(ln: String) -> bool {"},{"Add":" ln.len() == 4 && match ln.parse::() {"},{"Add":" Ok(year) => year >= 1920 && year <= 2002,"},{"Add":" Err(_) => false,"},{"Add":" }"},{"Add":"}"},{"Add":""},{"Add":"fn check_iyr(ln: String) -> bool {"},{"Add":" ln.len() == 4 && match ln.parse::() {"},{"Add":" Ok(year) => year >= 2010 && year <= 2020,"},{"Add":" Err(_) => false,"},{"Add":" }"},{"Add":"}"},{"Add":""},{"Add":"fn check_eyr(ln: String) -> bool {"},{"Add":" ln.len() == 4 && match ln.parse::() {"},{"Add":" Ok(year) => year >= 2020 && year <= 2030,"},{"Add":" Err(_) => false,"},{"Add":" }"},{"Add":"}"},{"Add":""},{"Add":"fn check_hgt(ln: String) -> bool {"},{"Add":" match ln.find(|c: char| !c.is_digit(10)) {"},{"Add":" Some(sep) => {"},{"Add":" let (num, unit) = ln.split_at(sep);"},{"Add":" match num.parse::() {"},{"Add":" Ok(num) => {"},{"Add":" if unit == \"in\" {"},{"Add":" num >= 59 && num <= 76"},{"Add":" } else if unit == \"cm\" {"},{"Add":" num >= 150 && num <= 193"},{"Add":" } else {"},{"Add":" false"},{"Add":" }"},{"Add":" },"},{"Add":" Err(_) => false,"},{"Add":" }"},{"Add":""},{"Add":" },"},{"Add":" None => false,"},{"Add":" }"},{"Add":"}"},{"Add":""},{"Add":"fn check_hcl(ln: String) -> bool {"},{"Add":" if ln.len() != 7 {"},{"Add":" return false;"},{"Add":" }"},{"Add":" let mut ci = ln.chars();"},{"Add":" if ci.next() != Some('#') {"},{"Add":" return false;"},{"Add":" }"},{"Add":" for c in ci {"},{"Add":" if !c.is_digit(16) {"},{"Add":" return false;"},{"Add":" }"},{"Add":" }"},{"Add":" true"},{"Add":"}"},{"Add":""},{"Add":"fn check_ecl(ln: String) -> bool {"},{"Add":" for ex in [\"amb\",\"blu\",\"brn\",\"gry\",\"grn\",\"hzl\",\"oth\"].iter() {"},{"Add":" if ln == *ex {"},{"Add":" return true;"},{"Add":" }"},{"Add":" }"},{"Add":" false"},{"Add":"}"},{"Add":""},{"Add":"fn check_pid(ln: String) -> bool {"},{"Add":" ln.len() == 9 && ln.chars().all(|c| c.is_digit(10))"},{"Add":"}"},{"Add":""},{"Add":"#[derive(Clone,Copy,Debug)]"},{"Add":"enum Document {"},{"Add":" Passport,"},{"Add":" NorthPole,"},{"Add":" Invalid"},{"Add":"}"},{"Add":""},{"Add":"struct DelimByEmpty {"},{"Add":" inner: I,"},{"Add":"}"},{"Add":""},{"Add":"impl DelimByEmpty {"},{"Add":" fn new(inner: I) -> Self {"},{"Add":" DelimByEmpty { inner: inner }"},{"Add":" }"},{"Add":"}"},{"Add":""},{"Add":"impl>, Q: Clone + std::cmp::Eq + std::hash::Hash, R: Clone> Iterator for DelimByEmpty {"},{"Add":" type Item = HashMap;"},{"Add":""},{"Add":" fn next(&mut self) -> Option {"},{"Add":" let mut result = HashMap::new();"},{"Add":" loop {"},{"Add":" match self.inner.next() {"},{"Add":" None => {"},{"Add":" if result.is_empty() {"},{"Add":" return None;"},{"Add":" } else {"},{"Add":" return Some(result);"},{"Add":" }"},{"Add":" },"},{"Add":" Some(line) => {"},{"Add":" if line.is_empty() {"},{"Add":" return Some(result);"},{"Add":" } else {"},{"Add":" for (key,val) in line.iter() {"},{"Add":" result.insert(key.clone(), val.clone());"},{"Add":" }"},{"Add":" }"},{"Add":" },"},{"Add":" }"},{"Add":" }"},{"Add":" }"},{"Add":"}"},{"Add":""},{"Add":"fn validate_line(found: HashMap, version: usize) -> Document {"},{"Add":" for (key,validator) in REQUIRED.iter() {"},{"Add":" match found.get(&String::from(*key)) {"},{"Add":" None => { return Document::Invalid; },"},{"Add":" Some(value) => {"},{"Add":" if version == 2 && !validator(value.clone()) {"},{"Add":" return Document::Invalid;"},{"Add":" }"},{"Add":" },"},{"Add":" }"},{"Add":" };"},{"Add":" if found.contains_key(&String::from(\"cid\")) {"},{"Add":" Document::Passport"},{"Add":" } else {"},{"Add":" Document::NorthPole"},{"Add":" }"},{"Add":"}"},{"Add":""},{"Add":"fn main() {"},{"Add":" use std::io::BufRead;"},{"Add":" let args: Vec<_> = env::args().collect();"},{"Add":" let version: usize = args[2].parse().unwrap();"},{"Add":" let result: i32 = DelimByEmpty::new("},{"Add":" std::io::BufReader::new(std::fs::File::open(&args[1]).unwrap())"},{"Add":" .lines()"},{"Add":" .map(Result::unwrap)"},{"Add":" .map(extract_keys)"},{"Add":" ).map(|d| validate_line(d, version))"},{"Add":" .map(|t| match t {"},{"Add":" Document::Invalid => 0,"},{"Add":" _ => 1,"},{"Add":" })"},{"Add":" .sum();"},{"Add":" println!(\"{:}\",result);"},{"Add":"}"},{"Add":""}]}}],"owner":"quickdudley","repo":"adventofcode","token":"sJD0fHGzQFNLZy+m47lXIEDO4Vg8tuaTmL1oVTW2DGo=","login":null}

…

Dependencies

Change contents