25 lines
781 B
Lua
25 lines
781 B
Lua
Utility = Utility or {}
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-- for unique ids
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Utility.CreateUniqueId = function(tbl, len, pattern) -- both optional
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tbl = tbl or {} -- table to check uniqueness. Ids to check against must be the key to the tables value
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len = len or 8
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local id = ""
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for i = 1, len do
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local char = ""
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if pattern then
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char = pattern:sub(math.random(1, #pattern), math.random(1, #pattern))
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else
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char = math.random(1, 2) == 1 and string.char(math.random(65, 90)) or math.random(0, 9) -- CAP letter and number
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end
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id = id .. char
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end
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if tbl[id] then
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return Utility.CreateUniqueId(tbl, len, pattern)
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end
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return id
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end
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Utility.RandomString = function()
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return Utility.CreateUniqueId(nil, 14, nil)
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end |