peek_front<-.rdeque {rstackdeque} | R Documentation |
Allows modification access to the front of a deque.
## S3 replacement method for class 'rdeque' peek_front(x, ...) <- value
x |
rdeque to modify the front element of. |
... |
additional arguments to be passed to or from methods (ignored). |
value |
value to assign to the front data element. |
Runs in O(1) worst case time. Throws an error if the rdeque is empty
. Modifies the element in place (i.e., is not side-effect-free).
modified rdeque.
peek_front.rdeque
for accessing the front data element.
d <- rdeque() d <- insert_front(d, data.frame(a = 1, b = 1)) d <- insert_front(d, data.frame(a = 1, b = 1)) peek_front(d)$a <- 100 print(d) peek_front(d) <- data.frame(a = 100, b = 100) print(d)