I'm building a wireless mechanical keyboard. There is an array of 6 elements that stores the keys pressed by the user (since 6 is the max number of keys you can send at once over Bluetooth). An example would be
02-05-03-00-00-00. Notice the "00" at the end, these are just "placeholders" and don't have a meaning other than to indicate that there are no more keys pressed. When the user releases key 05 for example, the array should become this
02-03-00-00-00-00. I don't know how to do this however, since you can't just remove and item from an array and there doesn't seem to be a polished option for lists in Arduino.
Does anyone have any idea for an algorithm that finds the 0's in an array, places them at the end of the array and keeps the order of the other elements?