Lua编程示例（一）：select、debug、可变参数、table操作、error

作者: 牙白的秘密
来源: 51数据库
2021-08-17

function test_print(...)
 for i=1,select("#",...) do
 print(i,select(i,...))
 end
end

test_print(11,12,13,14)


print()
print(debug.traceback())
print()

function test(...)
 for i=1,arg.n do
 print(i.."\t"..arg[i])
 end
end

test("a",2,34,234)
print()
g={}

table.insert(g,{
 name="clairs",
 level = 70,
})
table.insert(g,{
 name="sega",
 level = 35,
})
table.insert(g,{
 name="millber",
 level = 50,
})
function myprint()
 for i,v in ipairs(g) do
 print(i,v["level"],v.name)
 end
end

myprint()
function comp(a,b)
 return a.level<b.level
end
table.sort(g,comp)

print()
myprint()

print()
function foo(str)
 if type(str) ~= "string" then
 error("string error!",2)
 end
end

--foo({x =1 })

tb1={ "asdf","bate","game",one="heihei"}
table.insert(tb1,3,"haha")
table.remove(tb1,2)
for i,v in ipairs(tb1) do
 print(v)
end
print(#tb1)

运行结果为：

1 11 12 13 14
2 12 13 14
3 13 14
4 14

stack traceback:
 my_test.lua:12: in main chunk
 [c]: ?

1 a
2 2
3 34
4 234

1 70 clairs
2 35 sega
3 50 millber

1 35 sega
2 50 millber
3 70 clairs

asdf
haha
game
3

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