tuple and code cleanup

slice.go

@@ -11,18 +11,12 @@ func NewSliceFrom[T any](slice []T) Slice[T] {
 	copy(s, slice)
 	return s
 }
-func (s Slice[T]) Len() int {
-	return len(s)
-}
-func (s Slice[T]) Cap() int {
-	return cap(s)
-}
-func (s Slice[T]) Get(index int) T {
-	return s[index]
-}
-func (s Slice[T]) Last() T {
-	return s.Get(s.Len() - 1)
-}
+func (s Slice[T]) Len() int        { return len(s) }
+func (s Slice[T]) Cap() int        { return cap(s) }
+func (s Slice[T]) Get(index int) T { return s[index] }
+func (s Slice[T]) Last() T         { return s.Get(s.Len() - 1) }
+func (s Slice[T]) First() T        { return s.Get(0) }
+
 func (s Slice[T]) Index(el T) int {
 	for i := range s {
 		if reflect.DeepEqual(s[i], el) {
@@ -32,27 +26,7 @@ func (s Slice[T]) Index(el T) int {
 	return -1
 }
 
-// Swap is mutable func
-func (s Slice[T]) Swap(i, j int) Slice[T] {
-	s[i], s[j] = s[j], s[i]
-	return s
-}
-func (s Slice[T]) Filter(f func(e T) bool) Slice[T] {
-	out := make(Slice[T], 0)
-	for _, v := range s {
-		if f(v) {
-			out = append(out, v)
-		}
-	}
-	return out
-}
-func (s Slice[T]) Map(f func(e T) T) Slice[T] {
-	out := make(Slice[T], s.Len())
-	for i, v := range s {
-		out[i] = f(v)
-	}
-	return out
-}
+func (s Slice[T]) Push(e T) Slice[T] { return append(s, e) }
 func (s Slice[T]) Pop(index int) Slice[T] {
 	if index == 0 {
 		return s[1:]
@@ -69,31 +43,10 @@ func (s Slice[T]) Remove(el T) Slice[T] {
 	}
 	return s.Pop(index)
 }
-func (s Slice[T]) Push(e T) Slice[T] {
-	return append(s, e)
-}
 
-func (s Slice[T]) ToArray() []T {
-	out := make([]T, len(s))
-	copy(out, s)
-	return out
-}
-func (s Slice[T]) ToAnyArray() []any {
-	out := make([]any, len(s))
-	for i, v := range s {
-		out[i] = v
-	}
-	return out
-}
-func (s Slice[T]) ToSet() Set[T] {
-	return NewSetFrom(s)
-}
-
-// ForEach is mutable func
-func (s Slice[T]) ForEach(f func(e T) T) Slice[T] {
-	for i, v := range s {
-		s[i] = f(v)
-	}
+// Swap is mutable func
+func (s Slice[T]) Swap(i, j int) Slice[T] {
+	s[i], s[j] = s[j], s[i]
 	return s
 }
 
@@ -111,3 +64,42 @@ func (s Slice[T]) Equal(s2 Slice[T]) bool {
 	}
 	return true
 }
+
+func (s Slice[T]) ToArray() []T {
+	out := make([]T, len(s))
+	copy(out, s)
+	return out
+}
+func (s Slice[T]) ToAnyArray() []any {
+	out := make([]any, len(s))
+	for i, v := range s {
+		out[i] = v
+	}
+	return out
+}
+func (s Slice[T]) ToSet() Set[T]     { return NewSetFrom(s) }
+func (s Slice[T]) ToTuple() Tuple[T] { return NewTupleFrom(s) }
+
+func (s Slice[T]) Filter(f func(e T) bool) Slice[T] {
+	out := make(Slice[T], 0)
+	for _, v := range s {
+		if f(v) {
+			out = append(out, v)
+		}
+	}
+	return out
+}
+func (s Slice[T]) ForEach(f func(int, T)) Slice[T] {
+	for i, v := range s {
+		f(i, v)
+	}
+	return s
+}
+
+// Map is mutable func
+func (s Slice[T]) Map(f func(e T) T) Slice[T] {
+	for i, v := range s {
+		s[i] = f(v)
+	}
+	return s
+}