Higher Order Function হচ্ছে এমন একটি ফাংশন যা অন্য একটি ফাংশনকে আর্গুমেন্ট হিসেবে নিতে পারে বা একটি ফাংশনকে আউটপুট হিসেবে রিটার্ন করতে পারে। জাভাস্ক্রিপ্টে Higher Order Functions অনেক দরকারী এবং এট
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