MjkxODIwMDM3Mjl8MjA1LjEzNC4xNzIuMw==I wanted to check for an empty string, and so came by the Function NULL. Finally, a well specified function. The description;
Returns t if object is the empty list; otherwise, returns nil.
Luckily, in Common LISP the "empty list" and "nil" are one and the same, so this sentence can be written as is1.
And the examples;
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