Question

lua 不重复随机数算法 比如1-7 取7次 每次不能重复 高手请帮帮忙 急！！！

Answer 1

function RandomIndex(tabNum,indexNum)

indexNum = indexNum or tabNum

local t = {}

local rt = {}

for i = 1,indexNum do

local ri = math.random(1,tabNum + 1 - i)

local v = ri

for j = 1,tabNum do

if not t[j] then

ri = ri - 1

if ri == 0 then

table.insert(rt,j)

t[j] = true

end

end

end

end

return rt

end
--以下为用例
tab = {1,2,3,4,5,6,7}
s = RandomIndex(7,7)
for i = 1,7 do
print(tab[s[i]])
end

原帖地址
http://user.qzone.qq.com/415431019/blog/1308626965