SecureRandom.uuid vs UUID gem
Is there a difference between ruby's SecureRandom.uuid (Ruby 1.9.3) and the UUID gem? Is the UUID gem the "old" way of doing things?
From the docs I gather that the gem is more "safe" to be a real unique UUID while SecureRandom.uuid is more of a random string which has a larger chance of not being unique. In addition UUID seems to allow a file-based persistence to assist with this.
So I was hoping to hear from some people with more insight than me into this.
I want to manage a table with a VARCHAR primary key, that in the mapped java object should be a UUID. i have my sql-map-config.xml: <?xml version=1.0 encoding=UTF-8 ?> <!DOCTYPE configura
I am trying to get the UUID from a user. So far i tried Accessing the user from a liferay portlet? Get the current user Liferay using a simple Java code putting String userId = renderRequest.getRemote
I am using UUID Random number as a primary key of Object when i save object in Database. So this generated UUID number should be unique. This way i got random number. final String UUIDUserToken = UUI
I currently use INT as type for primary key in JavaDB (Apache Derby), but since I'm implementing an distributed system I would like to change the type to java.util.UUID. A few questions about this: W
How to generate uuid in ubuntu, I am using Anjuta IDE. Regards, iSight
I was searching if UUID generated by cakePHP (32 char long) is faster in performance compared to auto-increment. Comparison in both inserts and Select operation. Which one should I use UUID generated
I'd like to use UUID instead of the regular id on my models. Can this be done with the play framework?
Considering that an UUID rfc 4122 (16 bytes) is much larger than a MongoDB ObjectId (12 bytes), I am trying to find out how their collision probability compare. I know that is something around quite u
When creating a UUID in Python, likeso: >>> uuid.uuid1() UUID('a8098c1a-f86e-11da-bd1a-00112444be1e') How could one map that UUID into a string made up of the capitalized alphabet A-Z minus
Trying to convert a UUID to string without boost. I have the following but assigning the wszUuid to the string guid doesn't work. Anyone know how I can do this so I can return a stl string? string Ser
So I'm trying to make a grails app that hooks into an existing DB where the primary key column is a UUID: Column | Type | Modifiers -------------------+-----------------------------+----------- uuid
i have been getting this since updated to 5.0.1 warning: UUID mismatch detected with the loaded library - on disk is: /Users/alfredjunco/Library/Developer/Xcode/iOS DeviceSupport/5.0.1 (9A405)/Symbol
Whenever I try to set or retrieve a field of UUID type, I get the following error from JOOQ: Not supported by dialect : Type class java.util.UUID is not supported in dialect null Everything else wor
I want to set a uuid value to id field via function uuid(). And I do not want to use as Trigger. CREATE TABLE `test` ( `id` VARCHAR(36) NOT NULL DEFAULT uuid(), `username` VARCHAR(250) NULL DEFAULT
Is it possible for an ios App to listen to multiple UUID's? Specifically for apples iBeacon technology. NSUUID *uuid = [[NSUUID alloc] initWithUUIDString:@23542266-18D1-4FE4-B4A1-23F8195B9D39]; self
Possible Duplicate: Example of UUID generation in c++ I need an algorithm for generating a 24 character UUID, but all I have been able to find is generators that produce the standard 32 character on
How can create same(unique) UUID and how can i use that for all IOS Devices.In my code UUID is different in different devices. My code getting UUID is. NSString* uniqueIdentifier = [[[UIDevice curren
Does Data::UUID generates secure and random sequences? Is it ok to use it to generate password recovery link? For example: use Data::UUID; my $u = Data::UUID->new; my $uuid = $u->create_from_nam
I have an InnoDB based schema with roughly 100 tables, most use GUID/UUID's as the primary key. I started this at a point in time where I didn't really understand the implications of a UUID PK with re
I'm adding a 'GUID' key with a value of uuid.uuid1() (from python uuid module) for all my documents in Mongo. I noticed they are being stored not as strings, but as type BSON::Binary. I've done some G
I have a model with a CharField field with a default value of uuid4: f = models.CharField(default=uuid4, max_length=36, unique=True, blank=True) and this is causing the following error: Cannot succe
Im trying to get UUID of ble device. I was following android developers guide and so far I can get only device name and rssi. Im trying to get Uuid of the device that comes to scanning method that loo
I've been investigating an issue with iOS Bluetooth scanning. When scanning for BLE advertisements on iOS the UUID of an iBeacon is not what I expect it to be (according to what the default UUID of th
I am generating row keys using java: UUID.randomUUID().toString() What comparator should I use for CF? LexicalUUIDType UUIDType TimeUUIDType
I have installed the gem 'simple_uuid' but nothing seems to be working. Using irb and running the following: require 'rubygems' require 'simple_uuid' is fine, both return true. But running the follo
We need to generate UUIDs for every single entry we store in the backend. As I read in Wikipedia: Uuid Java implementation, there are 3 available UUID generators: - Standard Java UUID generator(which
I need UUID of a bluetooth device to connect to it, but i don't know much about uuid. Is it specific to each device and how to know what is device's uuid. Can it be done using code?
I have an older version of python on the server i'm using and cannot upgrade it. is there a way to get the uuid module?
The UUID specification defines 4 predefined namespaces which it describes as potentially interesting - meaning among other things, if other people have generated UUIDs in this namespace you can ver
I understand the differences between the two from the docs. uuid1(): Generate a UUID from a host ID, sequence number, and the current time uuid4(): Generate a random UUID. So uuid1 uses machine/sequen
<rdf:Description about='uuid:8949dbc6-31ad-11d9-9c7d-d112c21f7031'> Why this about does not contain urn:uuid:8949dbc6-31ad-11d9-9c7d-d112c21f7031 instead? Isn't the uuid a urn, and therefore re
String s = UUID.randomUUID().toString(); return s.substring(0,8) + s.substring(9,13) + s.substring(14,18) + s.substring(19,23) + s.substring(24); I use JDK1.5's UUID, but it uses too much time when I
I have already found a question for UUID regular expressions here, but these expressions do not account missing delimeters. I have come up with the following expression, but is there a more optimal Re
I'm trying to generate a UUID with all zeros: java.util.UUID fromString 00000000-00000000-00000000-00000000 The error is java.lang.IllegalArgumentException: Invalid UUID string: 00000000-00000000-
I'm trying to implement Instagram's UUID that they talked about in this post: http://instagram-engineering.tumblr.com/post/10853187575/sharding-ids-at-instagram My implementation looks like this: CREA
I came across this question and the answer suggests to manually download the gems instead of having them pulled by gem install. Well I am received the same error despite using a local gem file. $ git
If I'm using Long uuid = UUID.randomUUID().getMostSignificantBits() how likely is it to get a collision. It cuts of the least significant bits, so there is a possibility that you run into a collision,
Will the UUID generated using two programming languages say 'Ruby' and 'Java' be unique?
I have a text file contains some different UUID strings in it, I want to replace all the UUID strings by new different UUID strings, how can I do that easily in Bash?
Does it make sense to use UUID as primary key in MySQL? What would be pros and cons of using UUID instead of regular INT, beside trouble of hand querying?
I use to generate unique & random string mysql function UUID(), it's possible to set length of this generated string? I need only 8 letters. This insert i do with php insert function... Thank you
How do I validate that a value is equal to the UUID4 generated by this code? uuid.uuid4().hex Should it be some regular expression? The values generated of 32-character-long strings of this form: 60e
I'm a noobie trying get primary model's primary UUID automatically instantiated before it's stored into DB, I would not like to commit objects into db just to get the UUID available. The short snippe
Is there a way to generate random UUID like the ones used in CouchDB but with Node.js?
I know randomized UUID have very very very low probability for collision in theory, but I am wondering, in practice, how good is java 5's randonUUID in terms of not having collision? Does anybody have
I'm looking to generate a UUID (version 4) in PHP however all the methods I've seen use mt_rand() which I want to avoid as it poses security implications if the UUID generated can be guessed. I have c
Old code, works fine in Rails 3.0 on JRuby 1.6.4 with PostgreSQL 9.0: class User < ActiveRecord::Base before_validation(:on => :create) do self.id = generate_random_uuid end # Mode code, includi
I am developing a CakePHP app, and I would like to use UUID as a primary keys, since the application will be distributed accross multiple databases and I would also like to take advantage of the integ
The documentation of Data::UUID states that A UUID is 128 bits long, and is guaranteed to be different from all other UUIDs/GUIDs generated until 3400 CE. The documentation for APR::UUID describes
Does the SDK provide an API for retrieving the current Macbook's UUID?