mirror of
https://github.com/koreader/koreader
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35 lines
782 B
Lua
35 lines
782 B
Lua
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local tableutil = {}
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--http://stackoverflow.com/questions/15706270/sort-a-table-in-lua
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function tableutil.spairs(t, order)
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-- collect the keys
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local keys = {}
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for k in pairs(t) do keys[#keys + 1] = k end
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-- if order function given, sort by it by passing the table and keys a, b,
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-- otherwise just sort the keys
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if order then
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table.sort(keys, function(a, b) return order(t, a, b) end)
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else
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table.sort(keys)
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end
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-- return the iterator function
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local i = 0
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return function()
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i = i + 1
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if keys[i] then
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return keys[i], t[keys[i]]
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end
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end
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end
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function tableutil.tablelength(T)
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local count = 0
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for _ in pairs(T) do count = count + 1 end
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return count
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end
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return tableutil
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