From 1275d5b7385a8c446fcebdd6c071e697553c9f66 Mon Sep 17 00:00:00 2001
From: Matej Focko <mfocko@redhat.com>
Date: Thu, 7 Dec 2023 10:40:09 +0100
Subject: [PATCH] day(07): use match

Signed-off-by: Matej Focko <mfocko@redhat.com>
---
 src/bin/day07.rs | 48 ++++++++++++++++++++----------------------------
 1 file changed, 20 insertions(+), 28 deletions(-)

diff --git a/src/bin/day07.rs b/src/bin/day07.rs
index 2efe44f..2d44a17 100644
--- a/src/bin/day07.rs
+++ b/src/bin/day07.rs
@@ -88,20 +88,14 @@ impl Hand {
         let mut freqs = freqs.values().cloned().collect_vec();
         freqs.sort_by_key(|&c| Reverse(c));
 
-        if freqs[0] == 5 {
-            HandType::FiveOfAKind
-        } else if freqs[0] == 4 {
-            HandType::FourOfAKind
-        } else if freqs[0] == 3 && freqs[1] == 2 {
-            HandType::FullHouse
-        } else if freqs[0] == 3 {
-            HandType::ThreeOfAKind
-        } else if freqs[0] == 2 && freqs[1] == 2 {
-            HandType::TwoPair
-        } else if freqs[0] == 2 {
-            HandType::OnePair
-        } else {
-            HandType::HighCard
+        match freqs[..] {
+            [5, ..] => HandType::FiveOfAKind,
+            [4, ..] => HandType::FourOfAKind,
+            [3, 2, ..] => HandType::FullHouse,
+            [3, ..] => HandType::ThreeOfAKind,
+            [2, 2] => HandType::TwoPair,
+            [2, ..] => HandType::OnePair,
+            _ => HandType::HighCard,
         }
     }
 
@@ -113,20 +107,18 @@ impl Hand {
         let mut freqs = freqs.values().cloned().collect_vec();
         freqs.sort_by_key(|&c| Reverse(c));
 
-        if jokers == 5 || freqs[0] + jokers == 5 {
-            HandType::FiveOfAKind
-        } else if freqs[0] + jokers == 4 {
-            HandType::FourOfAKind
-        } else if freqs[0] + jokers == 3 && freqs[1] == 2 {
-            HandType::FullHouse
-        } else if freqs[0] + jokers == 3 {
-            HandType::ThreeOfAKind
-        } else if freqs[0] == 2 && freqs[1] == 2 {
-            HandType::TwoPair
-        } else if freqs[0] + jokers == 2 {
-            HandType::OnePair
-        } else {
-            HandType::HighCard
+        if jokers == 5 {
+            return HandType::FiveOfAKind;
+        }
+
+        match freqs[..] {
+            [n, ..] if n + jokers == 5 => HandType::FiveOfAKind,
+            [n, ..] if n + jokers == 4 => HandType::FourOfAKind,
+            [n, 2, ..] if n + jokers == 3 => HandType::FullHouse,
+            [n, ..] if n + jokers == 3 => HandType::ThreeOfAKind,
+            [2, 2, ..] => HandType::TwoPair,
+            [n, ..] if n + jokers == 2 => HandType::OnePair,
+            _ => HandType::HighCard,
         }
     }
 }