60 lines
895 B
Lua
60 lines
895 B
Lua
local utils = {}
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utils.sizeof = function(t)
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if not t then
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return 0
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end
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local size = 0
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for k,v in pairs(t) do
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size = size + 1
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end
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return size
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end
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utils.shallowDiff = function(a, b)
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local counters = {}
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for k,v in pairs(a) do
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local currentCounter = counters[v] or 0
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counters[v] = currentCounter + 1
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end
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for k,v in pairs(b) do
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if counters[v] then
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counters[v] = counters[v] - 1
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end
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end
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local ret = {}
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local n = 0
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for k,v in pairs(a) do
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if counters[v] and counters[v] > 0 then
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counters[v] = counters[v] - 1
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n = n + 1
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ret[n] = v
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end
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end
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return ret
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end
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utils.shallowClone = function(t)
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local res = {}
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for k,v in pairs(t) do
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res[k] = v
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end
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return res
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end
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utils.find = function(t, predicate)
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for k,v in pairs(t) do
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if predicate(v, k) then
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return v, k
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end
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end
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end
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return utils |