up to day 6

2020/6.js

@@ -0,0 +1,40 @@
+const fs = require('fs');
+
+const input = fs.readFileSync('6.txt').toString().split('\n\n');
+
+let uniqueGroupAnswers = [];
+for (let i of input)
+    uniqueGroupAnswers.push([... new Set(i.replace(/\n/g, '').split(''))]);
+
+let total = 0;
+for (let i of uniqueGroupAnswers)
+    total += i.length;
+
+console.log(`Part 1, Sum of answer counts: ${total}`);
+total = 0;
+
+function invArrDiff(arr)
+{
+    let seen = [];
+    for (str of arr)
+    {
+        str = str.split('');
+        for (i of str)
+        {
+            if (seen.includes(i))
+                seen.push(i);
+        }
+    }
+    return seen;
+}
+
+for (let i of input)
+{
+    let group = i.split('\n');
+    for (j of group)
+        j.split('');
+
+    total += invArrDiff(group).length;
+}
+
+console.log(`Part 2, Sum of answer counts: ${total}`);