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added tablex.compact to compact sequential tables of a known range containing nils
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parent
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commit
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27
tablex.lua
27
tablex.lua
@ -277,6 +277,33 @@ function tablex.values(t)
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return r
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end
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--collect all values over a range into a new sequential table
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--useful where a range may have been modified to contain nils
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-- range can be a number, where it is used as a numeric limit (ie [1-range])
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-- range can be a table, where the sequential values are used as keys
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function tablex.compact(t, range)
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local r = {}
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if type(range) == "table" then
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for _, k in ipairs(range) do
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local v = t[k]
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if v then
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table.insert(r, v)
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end
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end
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elseif type(range) == "number" then
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for i = 1, range do
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local v = t[i]
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if v then
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table.insert(r, v)
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end
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end
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else
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error("tablex.compact - range must be a number or table", 2)
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end
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return r
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end
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--append sequence t2 into t1, modifying t1
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function tablex.append_inplace(t1, t2, ...)
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for i, v in ipairs(t2) do
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