From 0799312f038cacc7e16cfa7ca9c8d495e8a3b65e Mon Sep 17 00:00:00 2001
From: Eric Wagoner <ewagoner@gmail.com>
Date: Sun, 4 Dec 2022 00:24:18 -0500
Subject: [PATCH] Solution for day four

---
 04/code.js   |   67 ++++
 04/input.txt | 1000 ++++++++++++++++++++++++++++++++++++++++++++++++++
 2 files changed, 1067 insertions(+)
 create mode 100644 04/code.js
 create mode 100644 04/input.txt

diff --git a/04/code.js b/04/code.js
new file mode 100644
index 0000000..ac5e41e
--- /dev/null
+++ b/04/code.js
@@ -0,0 +1,67 @@
+const fs = require('fs');
+
+const inputArray = fs.readFileSync('input.txt').toString().split("\n");
+
+// Part One
+let totalCount = 0;
+
+for (i in inputArray) {
+  const contents = inputArray[i].split(",");
+  const range1 = contents[0].split("-");
+  const range2 = contents[1].split("-");
+  if (
+    (parseInt(range1[0]) >= parseInt(range2[0]) && parseInt(range1[1]) <= parseInt(range2[1]) && parseInt(range1[1]) <= parseInt(range2[1]))
+    ||
+    (parseInt(range2[0]) >= parseInt(range1[0]) && parseInt(range2[1]) <= parseInt(range1[1]) && parseInt(range2[1]) <= parseInt(range1[1]))
+   ) {
+    totalCount++
+  }
+}
+
+console.log(totalCount);
+
+
+// Part Two
+
+totalCount = 0;
+
+for (i in inputArray) {
+  const contents = inputArray[i].split(",");
+  const range1 = contents[0].split("-");
+  const range2 = contents[1].split("-");
+  if (
+    (parseInt(range1[1]) >= parseInt(range2[0]) && parseInt(range1[1]) <= parseInt(range2[1]) && parseInt(range1[1]) <= parseInt(range2[1]))
+    ||
+    (parseInt(range2[1]) >= parseInt(range1[0]) && parseInt(range2[1]) <= parseInt(range1[1]) && parseInt(range2[1]) <= parseInt(range1[1]))
+   ) {
+    totalCount++
+  }
+}
+
+console.log(totalCount);
+
+// functions
+
+function getBadge(arrs) {
+  let badge = arrs[0];
+  for(let i = 1; i < arrs.length; i++){
+    badge = intersection(badge, arrs[i]);
+  };
+  return badge[0];
+}
+
+function getIntersection(contents) {
+  const length = contents.length;
+  const first = contents.substring(0, length / 2).split("");
+  const second = contents.substring(length / 2).split("");
+  return intersection(first, second)[0];
+}
+
+function getPriority(char) {
+  const characters = "abcdefghijklmnopqrstuvwxyzABCDEFGHIJKLMNOPQRSTUVWXYZ"
+  return characters.indexOf(char) + 1;
+}
+
+function intersection(first, second) {
+  return first.filter(x => second.includes(x));
+};
diff --git a/04/input.txt b/04/input.txt
new file mode 100644
index 0000000..ff6541a
--- /dev/null
+++ b/04/input.txt
@@ -0,0 +1,1000 @@
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