uuid

A shorter UUID, ASCII85 with PHP

由 前提是你 提交于 2019-12-07 19:03:23
问题 I read about the UUID v4 and it's virtually unique, and that's what I need. The problem is, it's a too large number, is it possible to generate UUID's like Facebook or Twitter with fewer characters? I read some post, where you can shrink this code to 20 with Ascii85, but don't see a reliable PHP script doing the job. Someone knows a tested class?? for random ID's it the best way to store this 20 char, right? --- Edit --- @David Schwartz Thanks. I need a random unique identifier in a single

Extract time from a UUID v1 in ruby

由 非 Y 不嫁゛ 提交于 2019-12-07 15:24:24
问题 I have stored data that has a UUID v1 as key and I now want to know when the UUID was generated. How do I do that the nice way? 回答1: This works with irb: require 'simple_uuid' uuid = SimpleUUID::UUID.new uuid.to_guid # actually this is what I have stored in my database Time.at(SimpleUUID::UUID.new(uuid.to_guid).seconds) # returns the time and date of the UUID Thanks to my friend KillerFox, he showed me the simple solution. 来源： https://stackoverflow.com/questions/6696518/extract-time-from-a

UUID bluetooth and android devices

由 夙愿已清 提交于 2019-12-07 15:22:10
问题 I'm trying to develop an application for Android devices that connects two devices, but the problem is that I can only connect (using Bluetooth) with PC Bluetooth or devices with another OS than Android. I think that the problem is the UUID, right now I'm using, in BluetoothCommandService.java : private static final UUID MY_UUID = UUID.fromString("00001101-0000-1000-8000-00805f9b34fb"); And then: private class ConnectThread extends Thread { private final BluetoothSocket mmSocket; private

Unique Linux filename, sortable by time

由 自古美人都是妖i 提交于 2019-12-07 13:17:12
问题 Previously I was using uuidgen to create unique filenames that I then need to iterate over by date/time via a bash script. I've since found that simply looping over said files via 'ls -l' will not suffice because evidently I can only trust the OS to keep timestamp resolution in seconds (nonoseconds is all zero when viewing files via stat on this particular filesystem and kernel) So I then though maybe I could just use something like date +%s%N for my filename. This will print the seconds

E-mail verification with keys made with uuid.uuid4. Safety, and uniquness of generated values [closed]

由 别等时光非礼了梦想. 提交于 2019-12-07 12:18:14
问题 Closed . This question needs to be more focused. It is not currently accepting answers. Want to improve this question? Update the question so it focuses on one problem only by editing this post. Closed 5 years ago . I would like to make e-mail verification in my website. I plane to send to user email with link to activation, where in link I plan to include key made with: str(uuid.uuid4()) which will be stored in table, where I also will store boolean indicating either user has used this link

Storing UUID as string in mysql using JPA

由 僤鯓⒐⒋嵵緔 提交于 2019-12-07 11:55:36
问题 I came across a blog of using UUID with Hibernate and MySql. Now the problem is, whenever I take a look at the database the ID's will be non-readable format (binary-16). How can I store UUID as a readable format like 7feb24af-fc38-44de-bc38-04defc3804fe instead of ¡7ôáßEN¹º}ÅÑs I was using this code @Id @GeneratedValue( generator = "uuid2" ) @GenericGenerator( name = "uuid2", strategy = "uuid2" ) @Column( name = "id", columnDefinition = "BINARY(16)" ) private UUID id; And the result is

Using UUID as business key and equals/hashmethod

由 北战南征 提交于 2019-12-07 11:41:52
问题 I am working on a new application and I need some help on how to implement the equals method and the hashCode method. I have been reading many questions already asked here on SO, and I have also read several blog posts that has lead me to this question. A little technical information first: I am using JPA (EclipseLink) and the application is for Java EE. After what I have read you should use immutable values for hashCode and equals, but since the fields in the class is usually modifiable you

iPhone UUID change when App Updated?

由 点点圈 提交于 2019-12-07 11:07:17
问题 I use iphone UUID for checking user's device is unique. I already know UUID will be changed when reinstall app. But, I have a question. Then, when app updated, UUID for my app will be changed? If UUID changed when app updated, where can I save UUID in iphone permanently(or same effect)? 回答1: Save out your created UUID into user preferences for the app, which should be backed up - if they restore the app from a backup you'll get back the UUID. If you want to be even more sure you can get back

.idl文件解析

由 纵饮孤独 提交于 2019-12-07 10:27:10
1、以下是vs2015 ATL项目（名称为：atlib）生成的idl文件： // atlib.idl : atlib的 IDL 源 // // 此文件将由 MIDL 工具处理以 // 产生类型库(atlib.tlb)和封送处理代码。 import “oaidl.idl”; import “ocidl.idl”; [ object, //指明com对象 uuid(FCF44EA5-5E02-44CB-8531-06A1A9C24360), //接口的uuid dual, //双重接口 nonextensible, pointer_default(unique) ] //接口定义 interface Ifcom : IDispatch{ [id(1)] HRESULT Add([in] LONG para1, [in] LONG para2, [out, retval] LONG* result); //接口函数 }; [ uuid(91EA5B3C-B774-4E24-BD20-21B191A1C131), version(1.0), ] //atlib库的uuid library atlibLib { importlib(“stdole2.tlb”); [ uuid(4323D8F3-9C80-4AF2-9370-CC29A3F043B5) ] // fcom的clsid

UUID shortening

由 ◇◆丶佛笑我妖孽 提交于 2019-12-07 08:22:12
问题 I need to calculate the daily number of unique users of an app. The only way I can uniquely identify a user is via their UUID (this is externally supplied so I am forced to use it). I know that my daily user counts are a couple of million users. I'd like to use a bitset in Redis to do a population count, but in order for this to work, I'd need a way of narrowing my UUID so that it could comfortably fit into a long. I am aware of the potential for collisions but I am not concerned about
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