uuid generator

UUID Introduction A UUID is a globally unique identifier of 128 bits, typically represented by a 32-byte string. It guarantees the uniqueness of time and space, also known as the GUID, called the UUID in the uuid――universally unique Identifier,python. It guarantees the uniqueness of the generation ID by MAC address, ti

The UUID meaning is a universal unique identifier (universally unique Identifier), which is a software construction standard and is also organized by the Open Software Foundation, OSF, in a distributed computing environment ( Distributed Computing Environment, DCE) part of the field. The purpose of the UUID is to allow all elements in a distributed system to have unique identification information without th

Python generator summary, python generator Summary Generator concept:The generator does not save the results in a series, but stores the results in the generator state. A value is returned each time the iteration is performed until the StopIteration exception ends.A

Python-Generator/point you don't know, python-generator1. What is a generator? By using the list generation method, we can directly create a list. However, due to memory restrictions, the list capacity must be limited. In addition, creating a list containing 1 million elements not only occupies a large storage space, but if we only need to access the first few elements, the space occupied by the vast majori

A UUID is a number generated on a machine that guarantees that all machines in the same time and space are unique. Typically the platform provides the API to generate the UUID. The UUID is based on the standards established by the Open Software Foundation (OSF), using Ethernet card addresses, nanosecond-seconds, chip ID codes, and many possible numbers. A combina

What is the format of the UUID string I think a lot of friends do not know, but you have already come to know what is the UUID, let's look at how to generate a UUID string. A UUID is a number generated on a machine that guarantees that all machines in the same time and space are unique. Typically the platform provides

writer:bysocket (mud and brick pulp carpenter) Micro-Blog: Bysocket Watercress: Bysocket reprint it anywhere u want DemandWhen designing a table, the project should deal with some data that is more concurrent, such that the order number cannot be duplicated, so it must remain unique. Originally thought to have a time stamp, accurate to the millisecond should be good. Later thought is wrong, the test environment a lot of the same ID, can not reach the unique identity. UuidThi

Udid is deprecated and is used as a unique identifier for the device. After obtaining the UUID, if you use Nsuserdefaults storage, and then reload after the program is unloaded, the UUID obtained is different from the previous. Use keychain storage to guarantee that the UUID will not change when the program unloads load. But when the machine is brushed or upgrade

The UUID meaning is a universal unique identifier (universally unique Identifier), which is a standard for software construction. The purpose of UUID is to allow all elements in a distributed system to have unique identifying information without the need to specify the identification information through the central control. In this way, each person can establish a UUID