Electronic Tracker I-9 Compliance Software & Management Solutions
Reactive data sources in turn perform this invalidation using one or moreTracker.Dependency objects. Each time a computation runs, it may access various reactive data sources that serve as inputs to the computation, which are called its dependencies. At some future time, one of these dependencies may trigger the computation to be rerun by invalidating it. OnInvalidate registers a one-time callback that either fires immediately or as soon as the computation is next invalidated or stopped. It is used by reactive data sources to clean up resources or break dependencies when a computation is rerun or stopped. Invalidating a computation marks it to be rerun atflush time, at which point the computation becomes valid again. It is rare to invalidate a computation manually, because reactive data sources invalidate their calling computations when they change. The device itself fits with the wallet and does not add much to weight or bulkiness, but does not feel flimsy at all. It is well made