如何在lua中调用一个随机函数？

Question

如果我想在if语句为真时调用随机函数，该怎么办？

local function move() end 
local function move2() end 
local function move3() end 

if (statement) then 
//make it choose a random function from the three which are above 
end 

Answer 1

您是否考虑过将这些函数放在表格中，并为要执行的函数选择随机索引？例如，如下所示：

local math = require("math") 

function a() 
    print("a") 
end 

function b() 
    print("b") 
end 

function c() 
    print("c") 
end 

function execute_random(f_tbl) 
    local random_index = math.random(1, #f_tbl) --pick random index from 1 to #f_tbl 
    f_tbl[random_index]() --execute function at the random_index we've picked 
end 

-- prepare/fill our function table 
local funcs = {a, b, c} 

-- seed the pseudo-random generator and try executing random function 
-- couple of tens of times 
math.randomseed(os.time()) 
for i = 0, 20 do 
    execute_random(funcs) 
end