Empty list, a seq type.
This namespace defines a type for object which extends
and has no items. CLJ format defines syntax for empty list
Note that persistent lists are a type of LIFO collections.
They are seqs, are counted and support
pop on empty list will however result in an exception
Except for very special cases, it is idiomatic to use
1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 (ns foo.bar (:api dunaj) (:require [dunaj.coll.empty-list :refer [empty-list]])) ;; prefer using nil to empty-list, and prefer using () to empty list (conj nil 1 2) ;;=> (2 1) (conj () 1 2) ;; less idiomatic ;;=> (2 1) (conj empty-list 1 2) ;; even less idiomatic ;;=> (2 1) ;; but empty-list has its valid applications (def x (chan 10)) (>!! x empty-list) ;; for cases where we have to pass a list, as channels don't accept nils
Available since version 1.0 (view source)
not referred automatically
VAR of type
An empty list. Same as
Note that if is often more idiomatic to use
nil instead of
(any form of) empty list or collection.