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https://github.com/SpaceVim/SpaceVim.git
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34 lines
726 B
Lua
34 lines
726 B
Lua
local binary = {}
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---Insert item to list to ordered index
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---@param list any[]
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---@param item any
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---@param func fun(a: any, b: any): "1"|"-1"|"0"
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binary.insort = function(list, item, func)
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table.insert(list, binary.search(list, item, func), item)
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end
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---Search suitable index from list
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---@param list any[]
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---@param item any
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---@param func fun(a: any, b: any): "1"|"-1"|"0"
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---@return number
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binary.search = function(list, item, func)
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local s = 1
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local e = #list
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while s <= e do
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local idx = math.floor((e + s) / 2)
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local diff = func(item, list[idx])
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if diff > 0 then
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s = idx + 1
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elseif diff < 0 then
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e = idx - 1
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else
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return idx + 1
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end
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end
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return s
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end
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return binary
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