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Lua语法练习

题目一、给一个表,表里有5个数,在[0-13]之间,其中0可以表示任意数,判断这个表是否连续?
思路:
连续的条件:
1、表中都是0
2、表中有4个0
3、0个数不大于3,经过排序之后除去0之外,最大值减去最小值的差小于5
注意:要排除掉除去0之外的数里面有相同的数


local list = {0,0,2,5,1}
function toCheck ()
    table.sort(list) -- 把数组从小到大排序
    local zero_num = 0
    for k,v in pairs(list) do
         if v == 0 then
             zero_num = zero_num + 1
         elseif v ~= 0 then
             for i = k+1,#list do
                    if v == list[i] then
                      print("该表不连续")

                       return
                   end   
             end
         end              
    end
    if zero_num == 4 or zero_num ==5 then
      print("该表连续") 
    elseif list[#list] - list[zero_num + 1] < 5 then
      print("该表连续")
    else
      print("该表不连续")
    end
end
toCheck()  

题目二、如何将一组数据等概率打乱?

t = {1,2,3,4,5,6,7,8,9}
local function shuffle(t)
    if not t then return end
    local cnt = #t
    for i=1,cnt do
        local j = math.random(i,cnt)
        t[i],t[j] = t[j],t[i]
    end
end
shuffle(t)
for k,v in pairs(t) do
    print(v)
end 

题目三、将一个数组从小到大排序,然后将重复出现的数字全部删除(后续数字往前移)

local t = {4,2,3,4,1,6,5,8,7}
local newArray = {}
table.sort(t)
newArray[1] = t[1]
for i = 2,#t do
    if t[i] ~= t[i - 1] then
        newArray[i] = t[i]
    end
end
for k,v in pairs(newArray) do
    print(v)
end


题目四、编写一个函数,将某个数组分成两个数组,一个存放偶数,一个存放奇数

local t = {4,2,3,4,1,6,5,8,7}
function device(array)
    local oushuArr = {}
    local jishuArr = {}
    for i = 1,#array do
        if t[i] % 2 == 0 then
            oushuArr[#oushuArr + 1] = array[i]
        else
            jishuArr[#jishuArr + 1] = array[i]
        end
    end
    return oushuArr,jishuArr
end

local a,b = device(t)

for k,v in pairs(a) do
    print(v)
end
print("=========")
for k,v in pairs(b) do
    print(v)
end