Map

Get the last used value without updating.

Revision of its value. Increments when value changes.

Returns a string representation of the object.

The default representation is platform dependent.

Get the latest value, updating itself if necessary.

If this Px contains a function, it can be extracted and the Px dropped from the signature. Every time the function is invoked it will use the latest value of this Px, even if you don't explicitly hold a reference to it anymore.

Example. From a Px[Int => String], an Int => String can be extracted.

In addition to updating when the underlying Px changes, this will also check its own result and halt updates if reusable.