lock
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lock
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The unlock function allows the contents of the specified symbol to be erased by the clear function.
Usage The unlock function is used to allow the contents of the specified symbol to be erased by the clear function.
For instance the following Lisp code shows how to to preserve the contents of global variables from the clear function.
(defun foo(Number:X) (cos (sqrt x)))
(foo 4.0) ;; returns -0.4161468365471
(clear)
(foo 4.0) ;; returns an unknown function error
(defun foo(Number:X) (cos (sqrt x)))
(lock foo:)
(clear)
(foo 4.0) ;; returns -0.4161468365471
(defun moo(Number:X) (cos (sqrt x)))
(lock _globals) ;; lock all non-void global symbols
(clear)
(foo 4.0) ;; returns -0.4161468365471
(unlock foo:)
(clear)
(foo 4.0) ;; returns an unknown function error
true)
(unlock name)
Expression:
Arguments
Name
Type
Description Argument: name Symbol
The name is unlocked and its contents will be destroyed by the clearfunction.
Returns:
Here are a number of links to Lambda coding examples which contain this instruction in various use cases.
Here are the links to the data types of the function arguments.
| Symbol |
Here are also a number of links to functions having arguments with any of these data types.
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