lua之select,unpack用法,luaselectunpack
lua之select,unpack用法,luaselectunpack
调用select时,必须传入一个固定实参selector(选择开关)和一系列变长参数。如果selector为数字n,那么select返回它的第n个可变实参,否则只能为字符串"#",这样select会返回变长参数的总数。例子代码:
- do
- function foo(...)
- for i = 1, select('#', ...) do //get the count of the params
- local arg = select(i, ...);//select the param
- print("arg", arg);
- end
- end
- foo(1, 2, 3, 4);
- end
local function show( ... ) print("unpack(...)====",unpack(...)) local a,b,c,d = unpack(...) end show({2,6,9,3})
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