add Solution 0026 [golang]

Author: lightfish-zhang

solution/0026.Remove Duplicates from Sorted Array/Solution.go

@@ -0,0 +1,21 @@
+/**
+ * @lc app=leetcode.cn id=26 lang=golang
+ * Accepted
+ * 161/161 cases passed (144 ms)
+ * Your runtime beats 36.91 % of golang submissions
+ * Your memory usage beats 40.4 % of golang submissions (8.2 MB)
+ */
+
+func removeDuplicates(nums []int) int {
+	if nums == nil || len(nums) == 0 {
+		return 0
+	}
+	j := 0
+	for i := 1; i < len(nums); i++ {
+		if nums[j] != nums[i] {
+			j++
+			nums[j] = nums[i]
+		}
+	}
+	return j + 1
+}