Elixir 隊(duì)列模塊

隊(duì)列是一種數(shù)據(jù)結(jié)構(gòu),它有效地實(shí)現(xiàn)了(雙頭的)FIFO(先進(jìn)先出)隊(duì)列:

iex> q = :queue.new
iex> q = :queue.in("A", q)
iex> q = :queue.in("B", q)
iex> {value, q} = :queue.out(q)
iex> value
{:value, "A"}
iex> {value, q} = :queue.out(q)
iex> value
{:value, "B"}
iex> {value, q} = :queue.out(q)
iex> value
:empty