Add generics

generics/generics.go

@@ -0,0 +1,63 @@
+package generics
+
+import (
+	"fmt"
+	"io"
+	"os"
+)
+
+type LinkedList[T any] struct {
+	Head *LinkedListElement[T]
+	Tail *LinkedListElement[T]
+}
+
+type LinkedListElement[T any] struct {
+	Next  *LinkedListElement[T]
+	Value T
+}
+
+func NewLinkedList[T any]() *LinkedList[T] {
+	return &LinkedList[T]{}
+}
+
+func (lst *LinkedList[T]) Push(value T) *LinkedListElement[T] {
+	node := &LinkedListElement[T]{
+		Value: value,
+	}
+
+	if lst.Head == nil {
+		lst.Head = node
+		lst.Tail = node
+	}
+
+	lst.Tail.Next = node
+	lst.Tail = lst.Tail.Next
+
+	return lst.Tail
+}
+
+func (lst *LinkedList[T]) Print(out io.Writer) {
+	curr := lst.Head
+
+	for curr != nil {
+		fmt.Fprint(out, curr.Value)
+
+		if curr.Next != nil {
+			fmt.Fprint(out, " → ")
+		}
+
+		curr = curr.Next
+	}
+
+	fmt.Fprintln(out)
+}
+
+func Generics() {
+	lst := NewLinkedList[int]()
+
+	for i := range 5 {
+		lst.Push(i)
+	}
+
+	lst.Print(os.Stdout)
+}

main.go

@@ -1,9 +1,11 @@
 package main
 
 // import "git.sangeeth.dev/gobyexample/runes"
-import "git.sangeeth.dev/gobyexample/structs"
+// import "git.sangeeth.dev/gobyexample/structs"
+import "git.sangeeth.dev/gobyexample/generics"
 
 func main() {
 	// runes.Runes()
-	structs.Structs()
+	// structs.Structs()
+	generics.Generics()
 }