Personally I find takeaways a minefield, some add lots of sugar, and the rice and the prawn crackers, nan etc can take ages to work through your system with the insulin doses, it's never an accurate insulin injection, so corrections are required hours later, and so I find them difficult to get right. I try and eat things like a mixed grill with salad from the indian or a soup or egg foo yung from the chinese as these are easier to bolus for.
You can still eat your takeaway if you want as long as your prepared to put the work in to get this right but it will take some trial and error to get right - using an app like carbs and cals to help calculate the carb content may help.