add: 只出现一次的数字等

src/array/remove-duplicates-from-sorted-array.js

@@ -0,0 +1,17 @@
+// LeetCode 26. 删除排序数组中的重复项 https://leetcode-cn.com/problems/remove-duplicates-from-sorted-array/
+// LintCode 100. 删除排序数组中的重复数字 https://www.lintcode.com/problem/remove-duplicates-from-sorted-array/description
+
+export default (nums) => {
+  if (!nums || (nums && nums.length === 0)) return 0
+  let i = 0
+  for (let n = 1, len = nums.length; n < len; n++) {
+    if (nums[n] !== nums[i]) {
+      nums[++i] = nums[n]
+      if (i !== n && n === len - 1) {
+        nums.splice(n, 1)
+      }
+    }
+  }
+
+  return i + 1
+}