chore: bump go version, comments, small fixes

cmd/gol/gol.go

@@ -34,6 +34,7 @@ func main() {
 
 	loop := func() {
 		ticker := time.NewTicker(250 * time.Millisecond)
+		defer ticker.Stop()
 		for {
 			term.GoHome()
 			front.PrintMe()

go.mod

@@ -1,3 +1,3 @@
 module gol
 
-go 1.19
+go 1.21

term/term.go

@@ -2,13 +2,16 @@ package term
 
 import "fmt"
 
+// CursorFlag is used as a parameter to function TurnCursor and
+// describes if cursor should be displayed or not.
 type CursorFlag bool
 
 const (
-	CursorOn  CursorFlag = true
+	CursorOn  CursorFlag = true  // Cursor should be visible
-	CursorOff CursorFlag = false
+	CursorOff CursorFlag = false // Cursor should be hidden
 )
 
+// TurnCursor turns the cursor on and off according to the parameter.
 func TurnCursor(onOff CursorFlag) {
 	if onOff == CursorOn {
 		fmt.Printf("\033[?25h")
@@ -17,40 +20,50 @@ func TurnCursor(onOff CursorFlag) {
 	}
 }
 
+// ClearScreen clears current screen.
 func ClearScreen() {
 	fmt.Printf("\033[2J")
 }
 
+// ResetTerminal resets terminal (ESC c)
 func ResetTerminal() {
 	fmt.Printf("\033c")
 }
 
+// GoHome moves cursor to the home position (upper left corner)
 func GoHome() {
 	fmt.Printf("\033[H")
 }
 
+// SaveCursor saves curent position of the SaveCursor
 func SaveCursor() {
 	fmt.Printf("\033[s")
 }
 
+// RestoreCursor restore cursor to the position saved previously with SaveCursor().
 func RestoreCursor() {
 	fmt.Printf("\033[u")
 }
 
+// EnableAlternateScreen switches the terminal to the alternative screen.
+// The alternative screen doesn't have the scroll buffer.
 func EnableAlternateScreen() {
 	fmt.Printf("\033[?1049h")
 }
 
+// DiableAlternateScreen switches the terminal to the primary screen.
 func DisableAlternateScreen() {
 	fmt.Printf("\033[?1049l")
 }
 
+// StartFullscreen saves the cursor, enables alternate screen and clears it.
 func StartFullscreen() {
 	SaveCursor()
 	EnableAlternateScreen()
 	ClearScreen()
 }
 
+// FinishFullscreen returns to the primary screen and restores the cursor.
 func FinishFullscreen() {
 	DisableAlternateScreen()
 	RestoreCursor()