Module:FunList/Iterators
From Melvor Idle
Documentation for this module may be created at Module:FunList/Iterators/doc
enumerable = {}
local enumerable = {}
local enumerable_mt = {
__index = enumerable,
__pairs = function(t) return t:overridePairs()end
}
function enumerable.new(tbl)
local self = setmetatable({}, enumerable_mt)
self.data = tbl
self.current = nil
self.index = nil
return self
end
function enumerable:moveNext()
-- Grab the next index for the internal table.
local ix = self.index
ix = next(self.data, ix)
self.index = ix
-- If the index exist, we have succesfuly moved to the next.
if key then
self.current = self.data[ix]
return true
end
return false
end
function enumerable:overridePairs()
self.index = nil
self.current = nil
local function iterator(t, k)
if self:moveNext() == true then
return self.index, self.current
else
return nil, nil
end
end
return iterator, self, nil
end
return enumerable