Add elements to left side of Deque objects.
Usage
addleft(.x, ...)
ref_addleft(.x, ...)
# S3 method for class 'Deque'
addleft(.x, ...)
# S3 method for class 'Deque'
ref_addleft(.x, ...)
Arguments
- .x
a [Deque] object
- ...
elements to be added.
Value
For Deque, an object of class Deque with the elements being
added to the left of .x.
Note
While addleft uses copy semantics ref_addleft work by reference.
Examples
d = deque(0)
add(d, a = 1, b = 2) # |0, a = 1, b = 2|
#> |0, a = 1, b = 2|
addleft(d, a = 1, b = 2) # |b = 2, a = 1, 0|
#> |b = 2, a = 1, 0|
