Clamps Dictionary

Function

(set-val ref value &key (force nil))

Set the value of ref-object ref to value if different than previous value. If force is non-nil, set in any case. Return value.

`ref`	An instance of ref-object
`value`	Any value of any type to be set.
`force`	A boolean indicating to set the value even if it is eql to the previous value of the ref-object.