guid

This is the best way I could come up with to convert a MySQL GUID/UUID generated by UUID() to a binary(16): UNHEX(REPLACE(UUID(),'-','')) And then storing it in a BINARY(16) Are there any implications of doing it this way that I should know of? Quassnoi Not many implications. It will slow down the queries a little, but you will hardly notice it. UNIQUEIDENTIFIER is stored as 16-byte binary internally anyway. If you are going to load the binary into a client and parse it there, note the bit order , it may have other string representation than the initial NEWID() . Oracle 's SYS_GUID() function

parse.py #超时设置timeout=10 10秒内正常返回 否则报错 请求错误，刷新尝试 import requests from retrying import retry # headers = {"User-Agent": "Mozilla/5.0 (Windows NT 10.0; WOW64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/65.0.3325.181 Safari/537.36"} headers = {"User-Agent": "Mozilla/5.0 (Linux; Android 8.0; Pixel 2 Build/OPD3.170816.012) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/65.0.3325.181 Mobile Safari/537.36"} @retry(stop_max_attempt_number=3)#响应数 def _parse_url(url):#可能会报错的函数 对这个做个异常捕获 控制处理 # print("*"*30) r=requests.get(url,headers=headers,timeout=5)#可能报错 assert r.status_code == 200 return r.content

The official documentation says they are optional. I know COM interop requires a unique identifier for each interface but every interface example I see has a GUID whether it's used with COM or not? Is there any benefit to including a GUID if its not going to be used with COM? I've noticed that some methods such as Supports (to determine if a class conforms to a specific interface) require that you define a GUID before you can use them. This page confirms it with the following information: Note: The SysUtils unit provides an overloaded function called Supports that returns true or false when

GUIDs get used a lot in creating session keys for web applications. I've always wondered about the safety of this practice. Since the GUID is generated based on information from the machine, and the time, along with a few other factors, how hard is it to guess of likely GUIDs that will come up in the future. Let's say you started 1000, or 10000 new sessions, to get a good dataset of the GUIDs being generated. Would this make it any easier to generate a GUID that might be used for another session. You wouldn't even have to guess a specific GUID, but just keep on trying GUIDs that might be