| | | nth-queue-element | |
|
| n queue => queue-element | [Generic Function] |
Purpose
Return the nth queue element on queue.
Method signatures
(n fixnum)
(queue queue)
=> queue-element or nil |
Package :gbbopen
Module :queue
Arguments and values
| n | A fixnum
| |
| queue | A GBBopen queue | |
| queue-element | A GBBopen queue element objec |
Returns
The specified queue element or nil if none exists.
Description
Returns the nth element in queue (zero origin) or
nil if the queue is shorter than n. If n is negative,
return the nth element counting backward from the end of the queue (one
origin).
See also
first-queue-element
last-queue-element
Examples
Return the first element on pending-ksas (equivalent to
first-queue-element):
> (nth-queue-element 0 pending-ksas) #<ksa 2217> >Return the last element on
pending-ksas (equivalent to
last-queue-element):
> (nth-queue-element -1 pending-ksas) #<ksa 2372> >
The GBBopen Project
| | | nth-queue-element | |