👉 A hitless operation is a type of operation that does not produce any output. For example, if you have an array and you want to retrieve all its elements, but there's no way to access them without consuming memory or causing an error, then you can define a function that takes the array as input and returns a hitless function instead. This will ensure that the function is only called once and return the desired output, even if it consumes some memory or causes an error.