Solutions to day 2

02/code.js

@@ -0,0 +1,101 @@
+const fs = require('fs');
+
+const inputArray = fs.readFileSync('input.txt').toString().split("\n");
+
+// Part One
+let totalScore = 0;
+
+for (i in inputArray) {
+  const value = (inputArray[i]);
+  const throws = value.split(" ");
+  const result = getResult(throws[0], throws[1]);
+  const score = getScore(result, throws[1]);
+  totalScore += score;
+}
+
+console.log(totalScore);
+
+
+// Part Two
+
+totalScore = 0;
+
+for (i in inputArray) {
+  const value = (inputArray[i]);
+  const throws = value.split(" ");
+  const result = getThrownResult(throws[1]);
+  const thrownThrow = getThrownThrow(throws[0], throws[1]);
+  const score = result + thrownThrow;
+  totalScore += score;
+}
+
+console.log(totalScore);
+
+
+
+// functions
+
+function getResult(them, me) {
+  let result;
+
+  if (them === "A") {
+    if (me === "X") {
+      result = 1;
+    } else {
+      result = me === "Y" ? 2 : 0;
+    }
+  }
+  if (them === "B") {
+    if (me === "Y") {
+      result = 1;
+    } else {
+      result = me === "Z" ? 2 : 0;
+    }
+  }
+  if (them === "C") {
+    if (me === "Z") {
+      result = 1;
+    } else {
+      result = me === "X" ? 2 : 0;
+    }
+  }
+  return result * 3;
+}
+
+function getScore(result, me) {
+  const options = ["X", "Y", "Z"];
+  const value = options.indexOf(me) + 1;
+  return value + result;
+}
+
+function getThrownResult(thrown) {
+  const results =  ["X", "Y", "Z"];
+  return results.indexOf(thrown) * 3;
+}
+
+function getThrownThrow(them, me) {
+  let result;
+
+  if (them === "A") {
+    if (me === "Y") {
+      result = 1;
+    } else {
+      result = me === "X" ? 3 : 2;
+    }
+  }
+  if (them === "B") {
+    if (me === "Y") {
+      result = 2;
+    } else {
+      result = me === "X" ? 1 : 3;
+    }
+  }
+  if (them === "C") {
+    if (me === "Y") {
+      result = 3;
+    } else {
+      result = me === "X" ? 2 : 1;
+    }
+  }
+  return result;
+}