Create 1243-array-transformation.js

Author: everthis

1243-array-transformation.js

@@ -0,0 +1,25 @@
+/**
+ * @param {number[]} arr
+ * @return {number[]}
+ */
+ const transformArray = function(arr) {
+  let cur = arr
+  while(true) {
+    const clone = cur.slice()
+    for(let i = 1; i < clone.length - 1; i++) {
+      if(cur[i] > cur[i - 1] && cur[i] > cur[i + 1]) clone[i]--
+      else if(cur[i] < cur[i - 1] && cur[i] < cur[i + 1]) clone[i]++
+    }
+    if(same(cur, clone)) return clone
+    cur = clone
+  }
+  
+  return cur
+  
+  function same(a1, a2) {
+    for(let i = 0; i< a1.length; i++) {
+      if(a1[i] !== a2[i]) return false
+    }
+    return true
+  }
+};