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mirror of https://github.com/Refactorio/RedMew.git synced 2025-03-17 21:08:08 +02:00

added Queue.lua

This commit is contained in:
grilledham 2018-01-25 23:31:09 +00:00
parent f713439499
commit d14f0aae76

33
utils/Queue.lua Normal file
View File

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local Queue = {}
function Queue.new()
local queue = {_head = 0, _tail = 0}
return queue
end
function Queue.size(queue)
return queue._tail - queue._head
end
function Queue.push(queue, element)
local index = queue._head
queue[index] = element
queue._head = index - 1
end
function Queue.peek(queue)
return queue[queue._tail]
end
function Queue.pop(queue)
local index = queue._tail
local element = queue[index]
queue[index] = nil
queue._tail = index - 1
return element
end
return Queue