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Merge #48 - functional.splat
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@ -84,6 +84,23 @@ end
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--alias
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functional.remap = functional.map_inplace
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--maps a sequence into a new index space (see functional.map)
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-- the function may return an index where the value will be stored in the result
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-- if no index (or a nil index) is provided, it will insert as normal
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function functional.splat(t, f)
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local result = {}
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for i = 1, #t do
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local v, pos = f(t[i], i)
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if v ~= nil then
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if pos == nil then
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pos = #result + 1
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end
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result[pos] = v
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end
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end
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return result
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end
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--filters a sequence
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-- returns a table containing items where f(v, i) returns truthy
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function functional.filter(t, f)
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