thresholdRange specification

This is the engineering specification for the MotionObservable operator: thresholdRange.

Overview

thresholdRange emits a value based on the incoming value’s position around a threshold range.

Example usage

stream.thresholdRange(min: 50, max: 100)

upstream min max  |  downstream
20       50  100  |  .below
50       50  100  |  .within
100      50  100  |  .within
120      50  100  |  .above

MVP

Expose a thresholdRange operator API

Use _nextOperator to implement the operator. Accept a threshold minimum and maximum value.

class MotionObservable<number> {
  public func thresholdRange(min: number, max: number) -> MotionObservable<ThresholdSide>