Clamps Dictionary
make-computed
Function
(make-computed fn &optional (setter nil))
Return a ref-object which recalculates and sets its value using fn whenever a ref-object accessed with get-val in the body of fn is changed and its unwatch fn as values.
Refer to Defining relations in the Clamps documentation for examples.
Arguments
fn |
Function of no arguments to call whenever a value accessed using get-val in the body of the function is changed. |
setter |
Function of one argument called with the value of the ref-object returned by make-computed whenever it changes. |