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-- Curried fripperies
put_in = function (t)
 local f
 f = function (k)
 if k then t[k] = true; return f
 else return end -- if
 end -- function
 return f
 end -- function
bag, enough = {}
put_in (bag) "wibble" (57) "grumpkin" "foo" (enough)
for k,v in pairs(bag) do print("bag has",k,"?",v) end

--- the classic recursive example:
function factorial(n)
 if n == 0 then
 return 1
 else
 return n * factorial(n-1)
 end
end
io.write("factorial of 10 is ", factorial(10), "\n")

-- and its tail recursive variant
fact = function (n)
 local f
 f = function (m,a)
 if m == 0 then return a end -- if
 return f(m-1,m*a) end -- function
 return f(n,1) end -- function
print("factorial of 10 is ",fact(10))

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Last edited August 8, 2017 6:03 pm GMT (diff)