Create 1089-duplicate-zeros.js

Author: everthis

1089-duplicate-zeros.js

@@ -0,0 +1,13 @@
+/**
+ * @param {number[]} arr
+ * @return {void} Do not return anything, modify arr in-place instead.
+ */
+const duplicateZeros = function(arr) {
+  const len = arr.length
+  for (let i = len - 1; i >= 0; i--) {
+    if (arr[i] === 0) arr.splice(i, 0, 0)
+  }
+  while (arr.length > len) {
+    arr.pop()
+  }
+}