Add solution and test-cases for problem 1089

leetcode/1001-1100/1089.Duplicate-Zeros/README.md

@@ -1,28 +1,25 @@
 # [1089.Duplicate Zeros][title]
 
-> [!WARNING|style:flat]
-> This question is temporarily unanswered if you have good ideas. Welcome to [Create Pull Request PR](https://github.com/kylesliu/awesome-golang-algorithm)
-
 ## Description
+Given a fixed-length integer array `arr`, duplicate each occurrence of zero, shifting the remaining elements to the right.
+
+**Note** that elements beyond the length of the original array are not written. Do the above modifications to the input array in place and do not return anything.
 
 **Example 1:**
 
 ```
-Input: a = "11", b = "1"
-Output: "100"
+Input: arr = [1,0,2,3,0,4,5,0]
+Output: [1,0,0,2,3,0,0,4]
+Explanation: After calling your function, the input array is modified to: [1,0,0,2,3,0,0,4]
 ```
 
-## 题意
-> ...
-
-## 题解
+**EXample 2:**
 
-### 思路1
-> ...
-Duplicate Zeros
-```go
 ```
-
+Input: arr = [1,2,3]
+Output: [1,2,3]
+Explanation: After calling your function, the input array is modified to: [1,2,3]
+```
 
 ## 结语
 

leetcode/1001-1100/1089.Duplicate-Zeros/Solution.go

@@ -13,3 +13,17 @@ func Solution(arr []int) {
 		}
 	}
 }
+
+func Solution1(arr []int) {
+	tmp := make([]int, len(arr))
+	index, i := 0, 0
+	for ; i < len(arr) && index < len(arr); i++ {
+		if arr[i] != 0 {
+			tmp[index] = arr[i]
+			index++
+			continue
+		}
+		index += 2
+	}
+	copy(arr, tmp)
+}

leetcode/1001-1100/1089.Duplicate-Zeros/Solution_test.go

@@ -30,10 +30,34 @@ func TestSolution(t *testing.T) {
 	}
 }
 
-//	压力测试
+func TestSolution1(t *testing.T) {
+	//	测试用例
+	cases := []struct {
+		name   string
+		inputs []int
+		expect []int
+	}{
+		{"TestCase", []int{1, 0, 2, 3, 0, 4, 5, 0}, []int{1, 0, 0, 2, 3, 0, 0, 4}},
+		{"TestCase", []int{1, 2, 3}, []int{1, 2, 3}},
+		{"TestCase", []int{}, []int{}},
+	}
+
+	//	开始测试
+	for i, c := range cases {
+		t.Run(c.name+" "+strconv.Itoa(i), func(t *testing.T) {
+			Solution1(c.inputs)
+			if !reflect.DeepEqual(c.inputs, c.expect) {
+				t.Fatalf("expected: %v, but got: %v, with inputs: %v",
+					c.expect, c.inputs, c.inputs)
+			}
+		})
+	}
+}
+
+// 压力测试
 func BenchmarkSolution(b *testing.B) {
 }
 
-//	使用案列
+// 使用案列
 func ExampleSolution() {
 }