feat(go): support basic pkg

codes/go/pkg/list_node.go

@@ -0,0 +1,59 @@
+// File: list_node.go
+// Created Time: 2022-11-25
+// Author: Reanon (793584285@qq.com)
+
+package pkg
+
+import (
+	"fmt"
+	"strconv"
+	"strings"
+)
+
+// ListNode Definition for a singly-linked list node
+type ListNode struct {
+	Next *ListNode
+	Val  int
+}
+
+// NewListNode Generate a list node with an val
+func NewListNode(v int) *ListNode {
+	return &ListNode{
+		Next: nil,
+		Val:  v,
+	}
+}
+
+// ArrayToLinkedListLinkedList Generate a linked list with an array
+func ArrayToLinkedListLinkedList(arr []int) *ListNode {
+	// dummy header of linked list
+	dummy := NewListNode(0)
+	node := dummy
+	for _, val := range arr {
+		node.Next = NewListNode(val)
+		node = node.Next
+	}
+	return dummy.Next
+}
+
+// GetListNode Get a list node with specific value from a linked list
+func GetListNode(node *ListNode, val int) *ListNode {
+	for node != nil && node.Val != val {
+		node = node.Next
+	}
+	return node
+}
+
+// PrintLinkedList Print a linked list
+func PrintLinkedList(node *ListNode) {
+	if node == nil {
+		return
+	}
+	var builder strings.Builder
+	for node.Next != nil {
+		builder.WriteString(strconv.Itoa(node.Val) + " -> ")
+		node = node.Next
+	}
+	builder.WriteString(strconv.Itoa(node.Val))
+	fmt.Println(builder.String())
+}