Detailed introduction to the usage of list in golang

Go language is an open source, high-performance programming language, mainly used in network security, cloud computing, distributed systems and other fields. In the Go language, list is a commonly used data structure, which is powerful and easy to use. This article will introduce in detail the usage of list in golang.

What is List?

In the Go language, List is an implementation of a doubly linked list. It is an efficient data structure that can perform insertion and deletion operations at any position, and provides the function of inserting, deleting, searching and other operations using any position. Since it is a doubly linked list, operations such as insertion, deletion, and search can be performed at the front, back, and middle of the linked list. List provides a variety of operations such as traversing, modifying, deleting, and adding linked lists, making linked list operations in Go language more flexible.

Creating a list

In the Go language, creating a List requires the use of the "container/list" package. In this package, there are functions specifically used to create a List. As shown below:

func New() *List

Among them, the New function returns a pointer to the List type. You can use "list := New()" to create a new linked list.

After creating the linked list, you can use some basic operations of the doubly linked list to process the data in the linked list. Below we will introduce some common operations in detail.

Add elements to the list

Use the PushBack method of the doubly linked list to insert a piece of data into the end of the linked list. The PushBack method accepts an element of type interface{}, which allows List to support any type of data.

package main

import (

"container/list"
"fmt"

)

func main() {

l := list.New()
l.PushBack("hello,")
l.PushBack("go")
l.PushBack("language!")

for e := l.Front(); e != nil; e = e.Next() {
    fmt.Print(e.Value)
}

}

at In the above code, we use the New function to create a new linked list l, and then use the PushBack method to add some elements to the linked list. Finally, a for loop is used to traverse and print out all elements in the linked list.

Add elements to the head of the list

Use the PushFront method of the doubly linked list to insert a data into the head of the linked list. This element will be ranked before the original elements in the linked list. The PushFront method accepts an element of type interface{}, which allows List to support any type of data.

package main

import (

"container/list"
"fmt"

)

func main() {

l := list.New()
l.PushFront("language!")
l.PushFront("go")
l.PushFront("hello,")

for e := l.Front(); e != nil; e = e.Next() {
    fmt.Print(e.Value)
}

}

at In the above code, we use the PushFront method to insert an element into the head of the linked list.

Insert elements into the list

Using the InsertBefore and InsertAfter methods of the doubly linked list can insert an element before or after the specified element. The first parameter accepted by these two methods is the element to be inserted, and the second parameter is the specified position. If the specified position is nil, the element will be inserted at the end of the linked list.

package main

import (

"container/list"
"fmt"

)

func main() {

l := list.New()
l.PushBack("hello")
l.PushBack("go")
l.PushBack("world")

e := l.Front()
l.InsertBefore("go ", e.Next())

for e := l.Front(); e != nil; e = e.Next() {
    fmt.Print(e.Value)
}

}

at In the above code, we use the InsertBefore method to insert an element in front of the specified element.

Delete elements in the list

Use the Remove method of a doubly linked list to delete any element from the linked list. This method accepts an element of type list.Element as a parameter. If the element is not in the linked list, , then panic will occur.

package main

import (

"container/list"
"fmt"

)

func main() {

l := list.New()
l.PushBack("hello")
l.PushBack("go")
l.PushBack("world")

e := l.Front()
l.Remove(e)

for e := l.Front(); e != nil; e = e.Next() {
    fmt.Print(e.Value)
}

}

at In the above code, we use the Remove method to delete an element from the linked list.

Get the length of the list

Use the Len method of the doubly linked list to get the length of the linked list. This method does not accept parameters.

package main

import (

"container/list"
"fmt"

)

func main() {

l := list.New()
l.PushBack("hello")
l.PushBack("go")
l.PushBack("world")

fmt.Printf("Length of list: %d", l.Len())

}

at In the above code, we use the Len method to get the length of the linked list.

Summary

Through the introduction of this article, we have learned how to use the list data structure in the Go language. List is a commonly used doubly linked list implementation, which provides the function of inserting, deleting, searching and other operations using any position. Through these operations, we can process the data in the linked list more flexibly, meet usage scenarios with different needs, and at the same time improve the performance and efficiency of the program.

The above is the detailed content of Detailed introduction to the usage of list in golang. For more information, please follow other related articles on the PHP Chinese website!