Create 162-find-peak-element.js

Author: everthis

162-find-peak-element.js

@@ -0,0 +1,15 @@
+/**
+ * @param {number[]} nums
+ * @return {number}
+ */
+const findPeakElement = function(nums) {
+  if(nums == null) return -1
+  const len = nums.length
+  if(len === 1) return 0
+  for(let i = 1; i < len; i++) {
+    if(i === 1 && nums[i] < nums[i - 1]) return 0
+    else if(i === len - 1 && nums[i] > nums[i - 1]) return len - 1
+    else if(nums[i] > nums[i - 1] && nums[i] > nums[i + 1]) return i
+  }
+  return -1
+};