Sorts the elements in a list according to a given compare function
(vl-sort list comparison-function)
Arguments
Any list.
A comparison function. This can be any function that accepts two arguments and returns T (or any non-nil value) if the first argument precedes the second in the sort order. The comparison-function value can take one of the following forms:
Return Values
A list containing the elements of list in the order specified by comparison-function. Duplicate elements may be eliminated from the list.
Examples
Sort a list of numbers:
_$ (vl-sort '(3 2 1 3) '<)
(1 2 3) ;
Note that the result list contains only one 3.
Sort a list of 2D points by Y coordinate:
_$ (vl-sort '((1 3) (2 2) (3 1))
(function (lambda (e1 e2)
(< (cadr e1) (cadr e2)) ) ) )
((3 1) (2 2) (1 3))
Sort a list of symbols:
_$ (vl-sort
'(a d c b a)
'(lambda (s1 s2)
(< (vl-symbol-name s1) (vl-symbol-name s2)) ) )
(A B C D) ; Note that only one A remains in the result list
