Programming-Idioms

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New Lua implementation by user [Nepta]

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2016-02-19, 15:33:27

2016-04-07, 06:53:49

Idiom #31 Recursive factorial (simple)

Create recursive function f which returns the factorial of non-negative integer i, calculated from f(i-1)

Create recursive function f which returns the factorial of non-negative integer i, calculated from f(i-1)

function f(n)
   local function f_(factorial,n)
      if n < 2 then return 1
      return f_(factorial*n, n-1)
   end
   return f_(1,n)
end

proper tail recursion

http://lua-users.org/wiki/ProperTailRecursion

http://codepad.org/HlGajPjE

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