Tutorial: Several methods to delete slice elements in Go language

Methods to delete slice elements in the Go language include: using the append function to add elements to an existing slice; using the copy function to copy elements to a smaller slice; using slice syntax to create a new slice and skip the elements to be deleted; using for Loop to remove elements one by one.

Tutorial: Several ways to delete slice elements in Go language

In Go language, slices are a convenient data structure used for storage A sequence of elements of the same type. Sometimes, you may need to remove elements from a slice. This article explains several ways to delete slice elements, including code examples.

Using the append function

append function is used to add elements to an existing slice. By combining a new slice with elements from an existing slice, you effectively remove elements from the existing slice.

// 创建一个整数切片
slice := []int{1, 2, 3, 4, 5}

// 从切片中删除索引为 2 的元素
slice = append(slice[:2], slice[3:]...)

// 打印修改后的切片
fmt.Println(slice) // 输出：[1 2 4 5]

Using the copy function

copy function is used to copy elements in a slice. By copying slice elements into a smaller slice, you effectively remove elements from the original slice.

// 创建一个整数切片
slice := []int{1, 2, 3, 4, 5}

// 从切片中删除索引为 2 的元素
copy(slice[2:], slice[3:])
slice = slice[:len(slice)-1]

// 打印修改后的切片
fmt.Println(slice) // 输出：[1 2 4 5]

Create a new slice using slice

You can use the slice syntax [start:end] to create a new slice containing the original part of the slice. This allows you to effectively skip elements you want to remove.

// 创建一个整数切片
slice := []int{1, 2, 3, 4, 5}

// 从切片中删除索引为 2 的元素
slice = slice[:2]

// 打印修改后的切片
fmt.Println(slice) // 输出：[1 2]

Using a for loop

While other methods are more efficient, you can also use a for loop to remove elements from a slice. This method involves looping through the slice elements and removing them one by one.

// 创建一个整数切片
slice := []int{1, 2, 3, 4, 5}

// 从切片中删除索引为 2 的元素
for i := 2; i < len(slice)-1; i++ {
    slice[i] = slice[i+1]
}
slice = slice[:len(slice)-1]

// 打印修改后的切片
fmt.Println(slice) // 输出：[1 2 4 5]

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