6 replies to this topic

[ry00000]

I want to be able to generate strings like this:
aaaaaaa
aaaaaab
aaaaaac
aaaaaad
aaaaaae
and so on...
How do you do this in Lua?

[Creator]

ry00000, on 23 January 2016 - 05:39 PM, said:

I want to be able to generate strings like this:
aaaaaaa
aaaaaab
aaaaaac
aaaaaad
aaaaaae
and so on...
How do you do this in Lua?

Bruteforcing?

local f = function()
local data = ""
for i=0,255 do -- add as many loops as nneeded
  data = string.char(i)
  for k=0,255 do -- as many loops as needed
    coroutine.yield(data = str:sub(data,1,1)..string.char(k)
  end
end
end

c = coroutine.wrap(f)
--call c as much as needed

[ry00000]

thanks!

[Creator]

ry00000, on 23 January 2016 - 06:08 PM, said:

thanks!

No problem.

[SquidDev]

Creator, on 23 January 2016 - 05:51 PM, said:

add as many loops as needed

It might be nicer to use a recursive function:

local function f(n, data)
  if n == 0 then
	coroutine.yield(data)
  else
	for i=0,255 do
	  f(n - 1, data .. string.char(i))
	end
  end
end

local function generate(n)
  return coroutine.wrap(function() f(n, "") end)
end

for item in generate(2) do -- Change this for an n long string
	print(item)
end

Edited by SquidDev, 23 January 2016 - 07:10 PM.

[ry00000]

Coooooool!!! This'll be immensely useful!!!

[Dragon53535]

Keep in mind, that for each digit to shift once, it takes n^x amount of cycles.

abcd

Lets say this just goes through lowercase letters, for d to change, well only one cycle is needed since it's the one that's always going to change .
However, for c to change it takes 26^1 amount of cycles to change, or 26. For b to change though it takes 26^2 to change for each letter. and for a it takes 26^3 or 17576 loops for each letter in that slot. If you used uppercase and lowercase, it'd be 52^3 or 140608... It takes a long time to loop through that.