Create 1056-confusing-number.js

Author: everthis

1056-confusing-number.js

@@ -0,0 +1,19 @@
+/**
+ * @param {number} n
+ * @return {boolean}
+ */
+const confusingNumber = function(n) {
+  //  0, 1, 6, 8, 9
+  const invalid = new Set(['2', '3', '4', '5', '7'])
+  const valid = new Set(['6', '9'])
+  const arr = ('' + n).split('')
+  let num = 0
+  for(let i = 0; i < arr.length; i++) {
+    const ch = arr[i]
+    if(invalid.has(ch)) return false
+    if(ch === '6') arr[i] = '9'
+    else if(ch  === '9') arr[i] = '6'
+  }
+  arr.reverse()
+  return arr.join('') !== '' + n
+};