takes a function that calculates some value from some other hyper-values
and return a new hyper-value equals to calculated expression.
Furthermore it remembers all hyper-values used in the function
and subscribe to them. Because of that, the returned hyper-value is always relevant.
takes a function that calculates some value from some other hyper-values and return a new hyper-value equals to calculated expression. Furthermore it remembers all hyper-values used in the function and subscribe to them. Because of that, the returned hyper-value is always relevant.