1 files changed, 28 insertions, 0 deletions
diff --git a/day5/day5-2.js b/day5/day5-2.js
new file mode 100644
index 0000000..8d29b96
--- /dev/null
+++ b/day5/day5-2.js
@@ -0,0 +1,28 @@
+const data = require('./data')
+const filterPlaces = (pass, entity, mark, min, max) => (
+  pass.forEach((p, i) => {
+    if (i > min && i <= max) {
+      p === mark
+        ? entity.splice(entity.length / 2, entity.length)
+        : entity.splice(0, entity.length / 2)
+    }
+  })
+)
+
+const checkId = (p) => {
+  const pass = p.split('')
+  const row = [...Array(128).keys()]
+  const column = [...Array(8).keys()]
+
+  filterPlaces(pass, row, 'F', -1, 6)
+  filterPlaces(pass, column, 'L', 6, 9)
+
+  return ID = row[0] * 8 + column[0]
+}
+
+const ids = [...data].map(checkId).sort((a, b) => (a-b))
+const missing = ids.filter((id, i) => ids[i] + 1 !== ids[i + 1]
+  && id !== ids[ids.length-1] )[0] + 1
+
+console.log(missing)
+