i like your idea, but the thing is that data from a stream arrives one by one and then i use it and throw it away. so this is not so stream usable rather processing usable.

maybe you can implement your code as add a number one by one, not as array processing. i don't understand well your algorithm to re arrange it so quickly.
and also to work as instantaneous result without offsetting backwards and not printing until width is reached.

var minmax=new Minmax(30)
minmax.add(3) //minmax.min=3 minmax.max=3
//insertdb(3,min,max)//i want to do
minmax.add(4) //minmax.min=3 minmax.max=4
//insertdb(4,min,max)
minmax.add(2) //minmax.min=2 minmax.max=3
//insertdb(2,min,max)

This is a lovely little utility for streaming data. I have a somewhat related use case:

• my 'window' is time based,
• observations come as pairs with <t_i, x_i>
• your class helps for min(x_i) and max(x_i) for all i
• when adding I also check if the time span between newest and oldest exceeds 'window lengths'
• if so, pop old values

Is there are clever way to use your data structure to update?