--- lam.util

local m = {}

function m.pop (tbl)
	--[[ Remove the first element from TBL. ]]
	return table.remove(tbl, 1)
end

function m.arity (r, min, max)
	--[[ Return whether R is within MIN and MAX (inclusive). ]]
	local len = #r
	return len >= min and len <= max
end

---
return m