使用lua螺旋列印陣列

今天在網上看到乙個有意思的題目，如何螺旋列印乙個陣列，比較好奇，就自己先用遞迴實現了一下。

local randomarray = ,

[2] = ,
[3] = ,
[4] = 
}for i,v in pairs(randomarray) do 
if type(v) == "table" then
for i,v in pairs(v) do
endend
end--邊界條件:#tb = 1
function printaroundchars(tb)
if tb and type(tb) == "table" then 
if #tb > 0 then
if #tb == 1 then
print("only one line")
else 
local w = #tb[1]
local h = #tb
local leftx = 1
local topy= 1
local xcursor = 1
local ycursor = 1
for i = 1,w do 
print(tb[1][i])
endfor i = 2,h do
print(tb[i][w])
endfor i = w-1,1,-1 do
print(tb[h][i])
endfor i = h-1,2,-1 do
print(tb[i][1])
endlocal nexttable = {}
for i = 2,h-1 do
for j = 2,w-1 do
if not nexttable[i-1] then
nexttable[i-1]={}
endnexttable[i-1][j-1] =tb[i][j]
endend
printaroundchars(nexttable)
endend
endendprintaroundchars(randomarray)

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