Update 163-missing-ranges.js

Author: everthis

163-missing-ranges.js

@@ -1,3 +1,24 @@
+/**
+ * @param {number[]} nums
+ * @param {number} lower
+ * @param {number} upper
+ * @return {string[]}
+ */
+const findMissingRanges = function(nums, lower, upper) {
+  const list = []
+  for (let n of nums) {
+    let justBelow = n - 1
+    if (lower === justBelow) list.push(lower + '')
+    else if (lower < justBelow) list.push(lower + '->' + justBelow)
+    lower = n + 1
+  }
+  if (lower === upper) list.push(lower + '')
+  else if (lower < upper) list.push(lower + '->' + upper)
+  return list
+}
+
+// another
+
 /**
  * @param {number[]} nums
  * @param {number} lower