without_front {rstackdeque}

Return a version of an rdeque or rpqueue without the front element

Description

Return a version of an rdeque or rpqueue without the front element

Usage

without_front(x, ...)

Arguments

x

rdeque or rpqueue to remove elements from.

...

additional arguments to be passed to or from methods (ignored).

Details

Simply returns a version of the given structure without the front element. The original is left alone.

Value

a version of the rdeque or rpqueue with the front element removed.

References

Okasaki, Chris. Purely Functional Data Structures. Cambridge University Press, 1999.

Examples

d <- rdeque()
d <- insert_front(d, "a")
d <- insert_front(d, "b")
d <- insert_back(d, "c")

d2 <- without_front(d)
print(d2)

d3 <- without_front(d2)
print(d3)

print(d)