Go – How to Work with List in Go Language

on April 20, 2019

Post Views: 2,170

Hello everyone, In this tutorial, we will show you how to work with list and various list examples in Go language. We are going to perform a few scenarios with list object such as

How to add elements to the list
How to get size or length of the list
How to merge the list objects
How to iterate the list objects
How to remove all elements from a list

The following examples are well tested and shared in the post.

#1 How to add elements to the list

package main
import (
"container/list"
)
func main() {
// creating a list object
listObj1 := list.New()
// pushing the elements back to the list
listObj1.PushBack("Dinesh")
listObj1.PushBack("Krishnan")
// pushing the elements front of the list
listObj1.PushFront("John")
}

#2 How to get size or length of the list

package main
import (
"container/list"
"fmt"
)
func main() {
// creating a list object
listObj1 := list.New()
// pushing the elements back to the list
listObj1.PushBack("Dinesh")
listObj1.PushBack("Krishnan")
// pushing the elements front of the list
listObj1.PushFront("John")
// getting the size of the list
length := listObj1.Len()
fmt.Println("The list size is:", length)
}

Output

The list size is: 3

#3 How to merge the list objects

package main
import (
"container/list"
"fmt"
)
func main() {
// creating a list object
listObj1 := list.New()
// pushing the elements back to the list
listObj1.PushBack("Dinesh")
listObj1.PushBack("Krishnan")
// pushing the elements front of the list
listObj1.PushFront("John")
// creating the list object
listObj2 := list.New()
listObj2.PushFront("Robert")
listObj2.PushFront("Smith")
// merging two list object to one list
listObj1.PushFrontList(listObj2)	
// getting the size of the list
length := listObj1.Len()
fmt.Println("The list size is:", length)
}

Output

The list size is: 5

#4 How to iterate the list objects

package main
import (
"container/list"
"fmt"
)
func main() {
// creating a list object
listObj1 := list.New()
// pushing the elements back to the list
listObj1.PushBack("Dinesh")
listObj1.PushBack("Krishnan")
// pushing the elements front of the list
listObj1.PushFront("John")
// creating the list object
listObj2 := list.New()
listObj2.PushFront("Robert")
listObj2.PushFront("Smith")
// merging two list object to one list
listObj1.PushFrontList(listObj2)
// iterating the list
for i := listObj1.Front(); i != nil; i = i.Next() {
fmt.Println(i.Value)
}
}

Output

Smith
Robert
John
Dinesh
Krishnan

#5 How to remove all elements from a list

package main
import (
"container/list"
"fmt"
)
func main() {
// creating a list object
listObj1 := list.New()
// pushing the elements back to the list
listObj1.PushBack("Dinesh")
listObj1.PushBack("Krishnan")
// pushing the elements front of the list
listObj1.PushFront("John")
// creating the list object
listObj2 := list.New()
listObj2.PushFront("Robert")
listObj2.PushFront("Smith")
// merging two list object to one list
listObj1.PushFrontList(listObj2)
// removing all elements from list
listObj1.Init()
if listObj1.Len() == 0 {
fmt.Println("List is empty :(")
} else {
// iterating the list
for i := listObj1.Front(); i != nil; i = i.Next() {
fmt.Println(i.Value)
}
}
}