Function: set:size
set:size is a function alias for length, defined in fns.c.
Signature
(set:size SEQUENCE)
Documentation
Return the length of vector, list or string SEQUENCE.
A byte-code function object is also allowed.
If the string contains multibyte characters, this is not necessarily
the number of bytes in the string; it is the number of characters.
To get the number of bytes, use string-bytes.
If the length of a list is being computed to compare to a (small)
number, the length<, length> and length= functions may be more
efficient.