From c9e4dab8628844a35b42fceb94f1997cc954172e Mon Sep 17 00:00:00 2001
From: Gabe Venberg <gabevenberg@gmail.com>
Date: Sat, 9 Dec 2023 19:45:19 -0600
Subject: [PATCH] optimized day07 parsing.

---
 Cargo.lock              |  2 --
 days/day07/Cargo.toml   |  2 --
 days/day07/src/parse.rs | 14 ++++----------
 3 files changed, 4 insertions(+), 14 deletions(-)

diff --git a/Cargo.lock b/Cargo.lock
index ee5de96..f8754b1 100644
--- a/Cargo.lock
+++ b/Cargo.lock
@@ -69,8 +69,6 @@ version = "0.1.0"
 dependencies = [
  "aoc_libs",
  "itertools",
- "once_cell",
- "regex",
 ]
 
 [[package]]
diff --git a/days/day07/Cargo.toml b/days/day07/Cargo.toml
index e535201..3c8d1de 100644
--- a/days/day07/Cargo.toml
+++ b/days/day07/Cargo.toml
@@ -7,6 +7,4 @@ edition.workspace = true
 
 [dependencies]
 aoc_libs.workspace = true
-regex.workspace = true
-once_cell.workspace = true
 itertools.workspace = true
diff --git a/days/day07/src/parse.rs b/days/day07/src/parse.rs
index c0ac092..70818a1 100644
--- a/days/day07/src/parse.rs
+++ b/days/day07/src/parse.rs
@@ -1,6 +1,4 @@
 use itertools::Itertools;
-use once_cell::sync::Lazy;
-use regex::Regex;
 
 #[derive(Debug, PartialEq, Eq, PartialOrd, Ord, Clone, Copy, Hash)]
 pub enum Card {
@@ -82,16 +80,13 @@ impl Hand {
     }
 }
 
-static PARSE_REGEX: Lazy<Regex> =
-    Lazy::new(|| Regex::new(r"^([AKQJT98765432]{5}) (\d+)$").unwrap());
-
 pub fn parse(input: &str) -> Vec<(Hand, u32)> {
     input
         .lines()
         .map(|line| {
-            let captures = PARSE_REGEX.captures(line).unwrap();
-            let hand = &captures[1];
-            let bid: u32 = captures[2].parse().unwrap();
+            let mut splits = line.split(' ');
+            let hand = splits.next().unwrap();
+            let bid: u32 = splits.next().unwrap().parse().unwrap();
             let hand: Vec<Card> = hand
                 .chars()
                 .map(|c| match c {
@@ -111,8 +106,7 @@ pub fn parse(input: &str) -> Vec<(Hand, u32)> {
                     e => panic!("invalid card {}", e),
                 })
                 .collect();
-            let hand = Hand::new(hand.try_into().unwrap());
-            (hand, bid)
+            (Hand::new(hand.try_into().unwrap()), bid)
         })
         .collect()
 }