General FizzBuzz: Difference between revisions

'''One of the few solutions which do not use expensive modulo ''(think about the CPU!)''.'''

{{trans|Python}}

<lang Lua>local def_n = 100

local def_mods = {

[3] = 'Fizz',

[5] = 'Buzz',

}

local function fizzbuzz(n, mods)

n = n or def_n

mods = mods or def_mods

local res = {}

for num, name in pairs(mods) do

for i = num, n, num do

res[i] = (res[i] or '') .. name

end

end

for i = 1, n do

res[i] = res[i] or i

end

return table.concat(res, '\n')

end

do

local n = tonumber(io.read()) -- number of lines, eg. 100

local mods = {}

local n_mods = 0

while n_mods ~= 3 do -- for reading until EOF, change 3 to -1

local line = io.read()

if not line then break end

local s, e = line:find(' ')

local num = tonumber(line:sub(1, s-1))

local name = line:sub(e+1)

mods[num] = name

n_mods = n_mods + 1

end

print(fizzbuzz(n, mods))

end

</lang>