From ff5ae63ee60f392f381b430f956546f8facaf321 Mon Sep 17 00:00:00 2001
From: Mark Fisher <mark.j.fisher@gmail.com>
Date: Sun, 25 Dec 2022 11:20:02 +0000
Subject: [PATCH] 2022 Day 25 refactor to char map to remove toString()

---
 advents/src/main/kotlin/net/fish/y2022/Day25.kt     | 9 ++-------
 advents/src/test/kotlin/net/fish/y2022/Day25Test.kt | 1 -
 2 files changed, 2 insertions(+), 8 deletions(-)

diff --git a/advents/src/main/kotlin/net/fish/y2022/Day25.kt b/advents/src/main/kotlin/net/fish/y2022/Day25.kt
index 06d8faf..42102be 100644
--- a/advents/src/main/kotlin/net/fish/y2022/Day25.kt
+++ b/advents/src/main/kotlin/net/fish/y2022/Day25.kt
@@ -15,14 +15,10 @@ object Day25 : Day {
 
     fun doPart2(data: List<String>): Int = data.size - 127
 
-    private val toDigits = mapOf("0" to 0L, "1" to 1L, "2" to 2L, "-" to -1L, "=" to -2L)
+    private val toDigits = mapOf('0' to 0L, '1' to 1L, '2' to 2L, '-' to -1L, '=' to -2L)
     private val fromDigits = toDigits.entries.associate { it.value to it.key }
 
-    fun fromSnafu(s: String): Long {
-        return s.fold(0L) { ac, d ->
-            ac * 5L + toDigits[d.toString()]!!
-        }
-    }
+    fun fromSnafu(s: String): Long = s.fold(0L) { ac, d -> ac * 5L + toDigits[d]!! }
 
     fun toSnafu(n: Long): String {
         return if (n == 0L) ""
@@ -31,7 +27,6 @@ object Day25 : Day {
             3L, 4L -> toSnafu(n / 5L + 1L) + fromDigits[m - 5L]
             else -> throw Exception("modulus fail for $n")
         }
-
     }
 
     @JvmStatic
diff --git a/advents/src/test/kotlin/net/fish/y2022/Day25Test.kt b/advents/src/test/kotlin/net/fish/y2022/Day25Test.kt
index 786ff72..b6aa7b8 100644
--- a/advents/src/test/kotlin/net/fish/y2022/Day25Test.kt
+++ b/advents/src/test/kotlin/net/fish/y2022/Day25Test.kt
@@ -1,7 +1,6 @@
 package net.fish.y2022
 
 import org.assertj.core.api.Assertions.assertThat
-import org.junit.jupiter.api.Assertions.*
 import org.junit.jupiter.params.ParameterizedTest
 import org.junit.jupiter.params.provider.CsvSource