peek_front<-.rdeque {rstackdeque}

Assign to/modify the front of an rdeque

Description

Allows modification access to the front of a deque.

Usage

## S3 replacement method for class 'rdeque'
peek_front(x, ...) <- value

Arguments

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.

Details

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).

Value

modified rdeque.

See Also

peek_front.rdeque for accessing the front data element.

Examples

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)