Last value buffer
Sometimes only the last result from a processing pipeline is off
interest, and we wish to `hold' this last result for use as required
in further processing. This can be done with the `hold' component,
shown in Figure 16. Any `Get' from the pipe returns the
last result `Put' into it. A typical application of the `hold'
component is to access the latest result of some other
computation. e.g. the estimation of some parameter.
| Hold value until replaced by put. |