list_dequeue (list l) ⇒ mixed
Gets and removes the first element from the list and returns the value.
Notes
Prior to version 1.7.3, this function would return a new list containing the updated list and the return value.
Prior to version 1.9.8
Prior to version 1.9.8 (Chirnside), this function would return false
when the list had a size smaller than 1. As of version 1.9.8 it returns a null.
Prior to version 1.8.7
Prior to version 1.8.7 (Portman), there is an implementation issue in which
list_pop and list_dequeue have their implementations
the wrong way around. It appears that the names were given to them the wrong
way around when they were added. Version 1.8.7 now makes list_pop
take the element at the end of list or array and list_dequeue take from
the start of the list or array.
