Learn to use common data structures and their methods in Go language

package main

import "fmt"

func main() {
    // 创建一个长度为5的整数数组
    var arr [5]int

    // 给数组赋值
    for i := 0; i < len(arr); i++ {
        arr[i] = i * i
    }

    // 打印数组的值
    for _, value := range arr {
        fmt.Println(value)
    }
}

package main

import "fmt"

func main() {
    // 创建一个空切片
    var slice []int

    // 给切片添加元素
    slice = append(slice, 1)
    slice = append(slice, 2)
    slice = append(slice, 3)

    // 打印切片的容量和长度
    fmt.Println("Capacity:", cap(slice))
    fmt.Println("Length:", len(slice))

    // 打印切片的值
    for _, value := range slice {
        fmt.Println(value)
    }
}

package main

import "fmt"

type Node struct {
    data int
    next *Node
}

type LinkedList struct {
    head *Node
}

func (list *LinkedList) add(data int) {
    newNode := &Node{data: data}

    if list.head == nil {
        list.head = newNode
    } else {
        current := list.head
        for current.next != nil {
            current = current.next
        }
        current.next = newNode
    }
}

func main() {
    linkedList := &LinkedList{}

    linkedList.add(1)
    linkedList.add(2)
    linkedList.add(3)

    current := linkedList.head
    for current != nil {
        fmt.Println(current.data)
        current = current.next
    }
}

package main

import "fmt"

type Stack struct {
    data []int
}

func (stack *Stack) push(value int) {
    stack.data = append(stack.data, value)
}

func (stack *Stack) pop() int {
    if len(stack.data) == 0 {
        return -1
    }
    value := stack.data[len(stack.data)-1]
    stack.data = stack.data[:len(stack.data)-1]
    return value
}

func main() {
    stack := &Stack{}

    stack.push(1)
    stack.push(2)
    stack.push(3)

    value := stack.pop()
    for value != -1 {
        fmt.Println(value)
        value = stack.pop()
    }
}

package main

import "fmt"

type Queue struct {
    data []int
}

func (queue *Queue) enqueue(value int) {
    queue.data = append(queue.data, value)
}

func (queue *Queue) dequeue() int {
    if len(queue.data) == 0 {
        return -1
    }
    value := queue.data[0]
    queue.data = queue.data[1:]
    return value
}

func main() {
    queue := &Queue{}

    queue.enqueue(1)
    queue.enqueue(2)
    queue.enqueue(3)

    value := queue.dequeue()
    for value != -1 {
        fmt.Println(value)
        value = queue.dequeue()
    }
}