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lua語言一個(gè)數(shù)組的問題。

lua語言一個(gè)數(shù)組的問題。

慕少森 2019-04-11 10:06:08
function minzhi()local days={"1","2","3","4","5","6","7","8","9","0","a","b","c","d","e","f","g","h","j","k","l","q","w","e","r","t","y","u","i","o","p","z","x","c","v","b","n","m"}endprint (minzhi())如何讓函數(shù)每次運(yùn)行，從第一個(gè)數(shù)組開起輸出，一直到最后一個(gè)，又從第一個(gè)輸出，這樣循環(huán)顯示
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2 回答

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largeQ

TA貢獻(xiàn)2039條經(jīng)驗(yàn) 獲得超8個(gè)贊

用 closure 最簡(jiǎn)單，比如下面的代碼，每次調(diào)用 minzhi() 都會(huì)打印 days 里的元素。

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function newMinzhi()

    local days={"1","2","3","4","5","6","7","8","9","0","a","b","c","d","e","f","g","h","j","k","l","q","w",

        "e","r","t","y","u","i","o","p","z","x","c","v","b","n","m"}

    local idx = 1

    return function ()

        if idx > #days then

            idx = 1

        end

        print(days[idx])

        idx = idx + 1

    end

end

 

minzhi = newMinzhi()

minzhi()   -- 打印 1

minzhi()   -- 打印 2

minzhi()   -- 打印 3

................

 


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反對(duì) 回復(fù) 2019-04-12
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九州編程

TA貢獻(xiàn)1785條經(jīng)驗(yàn) 獲得超4個(gè)贊


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-- 之前的版本直接把內(nèi)容打印出來了，現(xiàn)在的版本改成返回 days 中的值。

 

function newMinzhi()

    local days= {"中", "國"}

    local idx = 1

    return function ()

        if idx > #days then

            idx = 1

        end

        local ret = days[idx]

        idx = idx + 1

        return ret

    end

end

minzhi = newMinzhi()

print(minzhi())

print(minzhi())


 


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反對(duì) 回復(fù) 2019-04-12
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