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stack creates a stack.
stack
stack(items = NULL)
a list of items
Following methods are exposed:
.$push(item) .$pop() .$peek() .$clear() .$size() .$as_list() .$print()
item: any R object
item
queue and deque
s <- stack() s$push("first") s$push("second") s$pop() # second s$pop() # first s <- stack(list("foo", "bar")) s$push("baz")$push("bla")
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