uniqueidentifier

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Unique serial number in a java web application

I\'ve been wondering what\'s the correct practice for generating unique ids? The thing is in my web app I\'ll have a plugin system, when a user registers a plugin I want to generate a unique serial ID[详细]

2023-02-01 03:25 分类：问答
Contact-less card through an OmniKey, how to get "UID"?

I am trying to read information off of a smartcard, using a contact-less OmniKey 5321 card reader. Edit: Added a bounty.[详细]

2023-02-01 02:02 分类：问答
Generate a unique number without database

How do I generate a unique number in c# without the database? (max 17 di开发者_如何学Gogits). EDIT: digits only.You could take a look at Twitter\'s open source Snowflake project for inspiration, whi[详细]

2023-01-30 02:37 分类：问答
How to create true unique number for each user ( session ? ) in php 5.2

Im new to php if I like to create true safe ( multithread safe ) unique number for each user when he create a file , the file name will be开发者_运维百科 build from unique name , that i guess will co[详细]

2023-01-29 06:20 分类：问答
assign a retrievable unique ID to a changing lambda list in python?

def a(p): return p + 1 def b(p): return p + 2 def c(p): return p + 3 l= [a,b,c] import itertools ll = itertools.combinations(l, 2)[详细]

2023-01-27 05:04 分类：问答
Generate a unique value for a combination of two numbers

Consider I\'ve two numbers 1023232 & 44. I want to generate a unique number representing this com开发者_运维百科bination of numbers. How can i generate it?[详细]

2023-01-26 12:23 分类：问答
How to to create unique random integer ID for primary key for table?

I was wo开发者_开发百科ndering if anybody knew a good way to create a unique random integer id for a primary key for a table. I\'m using MySQL. The value has to be integer.In response to: \"Because I[详细]

2023-01-26 12:04 分类：问答
myVariable(int) == 0 same as myVariable(Guid) == Guid.Empty

I recently converted a bunch of tables PK\'s from int to uniqueidentifier.Now in my code I am replacing certain checks like so:[详细]

2023-01-23 04:34 分类：问答
How to give each object in a document a unique ID?

I\'m making a bitmap editor where a document consists of several layers where each layer represents a bitmap. Each layer must have a unique ID compared to all other layers that currently exist in the[详细]

2023-01-21 08:33 分类：问答
Maximum recursion depth exceeded when providing unique id

I wanted to provide unique ID for different categories of models in my db. So I\'ve introduced a dummy model :[详细]

2023-01-20 16:03 分类：问答