1 files changed, 37 insertions, 0 deletions
diff --git a/day7/day7-2.js b/day7/day7-2.js
new file mode 100644
index 0000000..64f6b5b
--- /dev/null
+++ b/day7/day7-2.js
@@ -0,0 +1,37 @@
+const data = require('./data')
+const arrays = data
+  .replace(/\n/g,"")
+  .replace(/bag(s)?/g,"")
+  .split('.').slice(0,-1)
+  .map(s => s.split(' contain '))
+  .map(s => [s[0].trim(), s.slice(1).map(x => x.trim().split(' , '))[0]])
+  .map(s => [s[0], s[1].map(x => {
+    if (x !== 'no other') {
+      return[x.replace(/\d+/g, '').trim(), parseInt(x.match(/[0-9]+/g))]
+    } else {
+      return ['no other', 1]
+    }})])
+  .map(s => [s[0], s[1].filter(x => x !== null)])
+
+let gold = arrays.find(s => s[0] === 'shiny gold')[1]
+let parents = 0
+
+gold.forEach(g => parents += g[1])
+
+while (
+  gold.map(g => g[0] !== 'no other').some(g => true)
+) {
+  gold = gold.map(g => {
+    if (arrays.find(s => s[0] === g[0])) {
+      return arrays.find(s => s[0] === g[0])[1].map(x => {
+        if (x[0] != 'no other') {
+          parents = parents + (x[1] * g[1])
+        }
+        return ([x[0], x[1] * g[1]])
+      })
+    } else { return [] }
+  }).flat(1)
+}
+
+console.log(parents)
+