type---The type of population, one of :LIST (the default) or :ALIST

initial-contents--- A sequence of elements (or conses, for :alist) to be used to initialize the population. The sequence itself (and the conses in case of an alist) is not stored in the population, a new list or alist is created to hold the elements.

Creates a new population of the specified type.

returns the type of population, one of :LIST or :ALIST

returns the list encapsulated in population. Note that as long as there is a direct (non-weak) reference to this list, it will not be modified by the garbage collector. Therefore it is safe to traverse the list, and even modify it, no different from any other list. If you want the elements to become garbage-collectable again, you must stop refering to the list directly.

Sets the list encapsulated in population to contents. Contents is not copied, it is used directly.