Refers to an element that is distinctly different from any other element in a collection.
Refers to an element that is distinctly different from any other element in a collection.
Questions tagged [unique]
6072 questions
2
votes
2 answers
Groovy remove duplicate from list using unique function
I'm using soapui groovy script.
I want to remove the duplicate from a list, using the next code:
def myStr = "aaaa ; bbbb ; ccccc"
def myList = myStr.split(";")
myList = myList.unique()
but when i tun the code i get exception:
No signature of…
Adi Mor
- 2,145
- 5
- 25
- 44
2
votes
1 answer
How to enforce uniqueness on a polymorphic join table?
Suppose I have a Genre model that can be associated with either an instance of Book or Movie. Something like,
class Genre < ActiveRecord::Base
belongs_to :genreable, polymorphic: true
end
class Book < ActiveRecord::Base
has_many :genres, as:…
ivan
- 6,032
- 9
- 42
- 65
2
votes
2 answers
how to count adjacent elements in a 3d numpy array efficiently
I have a 3d numpy array fill with integers from 1 to 7.
I want to count the number of unique elements in neighbour cells of each cell. For exmaple, in a 2d array:
a=[[1,1,1,7,4],
[1,1,1,3,2],
[1,1,1,2,2],
[1,3,1,4,2],
[1,1,1,4,2]] …
YC.Chui
- 169
- 1
- 2
- 7
2
votes
1 answer
R: Counting the number of matches between multiple data frames
I want to find the number of matches based on ID of unique matches within multiple data.frames
Data looks like this:
df1: KeyID
x
x
y
y
z
df2: KeyID
x
x
x
z
z
df3: KeyID
…
CoryB
- 75
- 1
- 3
- 11
2
votes
5 answers
What is guid and how could I generate this in php?
I want to create a unique string for our users. our site in php.
right now I am using uniqid() for this but it returns a new value every time when I refresh a page. how could I can stop to generate this every time?
can anyone help me?
tutoground
- 96
- 7
2
votes
1 answer
SonataUserBundle FOSUserBundle UniqueEntity email & username
I have my own User Class, wich inherits Sonata's BaseUser (Sonata\UserBundle\Entity\BaseUser).
My problem: If I try to create a user from sonata admin using an existing email, I get the following exception:
"Failed to create object:…
user3854018
- 21
- 2
2
votes
1 answer
Generate unique list from a list of lists
I'm trying to define a function that will accept an arbitrary number of lists and will generate a single list of unique elements from those lists. (I'm using Python 3.4)
Example:
a = ['lion', 'tiger', 'panther']
b = ['dog', 'lion', 'bear']
c =…
lagunazul
- 257
- 3
- 5
- 10
2
votes
2 answers
Using WHERE with SUM function SQL
SELECT imagename, SUM(ratingvalue) as "lol"
FROM ratings
GROUP BY imagename;
How do I go about grabbing the total of a specific imagename so i can then display it onto the page, so for example instead of returning the results for all…
Emmett
- 357
- 2
- 4
- 15
2
votes
2 answers
MySQL UNIQUE error on 2 different UTF-8 string?
I create a tool to leech users for my xenforo forum but I have a mistake with 2 users, such as sample below.
CREATE TABLE IF NOT EXISTS `xf_user` (
`user_id` int(10) unsigned NOT NULL AUTO_INCREMENT,
`username` varchar(50) NOT NULL,
`email`…
Martin Leung
- 99
- 7
2
votes
2 answers
Counting unique keys in Couchbase views
I'm trying to figure out a way to count the number of unique values in a bucket that is not a primary key. Couchbase 2.5 provides a n1ql method to do this. If we use their beer-sample you can issue the following command:
select count(distinct…
user3775720
- 29
- 2
2
votes
4 answers
Need help generating a unique request code for alarm
My app structure is like, there are 1000 masjids/mosques and each masjid has been given a unique id like 1,2,3,4 ..... 1000 . Now each mosque has seven alarms associated with it , I wish to generate a unique request code number for each alarm so…
user3671032
- 211
- 2
- 16
2
votes
1 answer
Cartesian product of several vectors
similar questions have been asked before but I cant find an exact match to my question.
I have 4 vectors each of which hold between 200-500 4 digit integers. The exact number of elements in each vector varies but I could fix it to a specific value.…
Stephen Blinkhorn
- 637
- 2
- 7
- 17
2
votes
2 answers
Generating Unique 6-digit numbers per day
I'm developing a multi-process solution and have to assign 6 digit unique numbers to some objects (specifying more than 6 digits or using alphanumeric characters is not possible. The length of this number is a third-party constraint).
since this…
Kamyar
- 18,639
- 9
- 97
- 171
2
votes
2 answers
Non-repeated arrays in a matrix in matlab
I am looking for non-repeated rows in a matrix.
Assume:
A =
8 1
2 2
2 2
2 2
2 2
3 6
5 7
5 7
I would like to get "B" which is:
B=
8 1
3 6
Please mind C=unique(A,'rows') will give us unique rows of…
Iman
- 412
- 4
- 18
2
votes
0 answers
Unique Constraint Validation
I have a JPA Entity, and in this entity I have a field that is Annotated by:
import javax.persistence.*;
....
@Column(nullable=false, unique=true)
private String name;
Then I have a form on a XHTML Page wich the following form:
…
Sam
- 313
- 4
- 21