Top "Unique" questions

Filter unique values from a JSON

I am using angularjs for my page. I want to filter the values from the JSON object, So that no …

angularjs filter unique unique-key ng-repeat

R: Count unique values by category

I have data in R that looks like this: Cnty Yr Plt Spp DBH Ht Age 1 185 1999 20001 Bitternut 8.0 54 47 2 185 1999 20001 Bitternut 7.2 55 50 3 31 1999 20001 Pignut 7.4 71 60 4 31 1999 20001 Pignut 11.4 85 114 5 189 1999 20001 …

r count unique categories

Unique constraint with JPA and Bean Validation

I'd like to have a @Unique constraint with Bean Validation, but that is not provided by the standard. If I …

java validation jpa unique bean-validation

Checking if all elements of a vector are equal in C++

If I have a vector of values and want to check that they are all the same, what is the …

c++ algorithm vector comparison unique

Change unique key together in mysql

I have in my MYSQL table a unique key and i want to add to it. UNIQUE KEY `user_id` (`…

mysql unique

Is there an AddUnique method similar to Addrange() for alist in C#

I have a list in C#: var list = new List<Car>(); list.AddRange(GetGreenCars()); list.AddRange(GetBigCars()); list.…

c# collections unique

Alter a live table to make a key non-unique

I saw some other questions related to this, but they were not MySQL. The database is a live database, so …

mysql unique alter-table

How to count unique records and get number of these uniques in table using SQL?

Imagine I have table like this: id:Product:shop_id 1:Basketball:41 2:Football:41 3:Rocket:45 4:Car:86 5:Plane:86 Now, this is an example …

sql count unique numbers records

HashSet contains duplicate entries

A HashSet only stores values ones, when the equals method says that they're the same. Thats what I thought. But …

java set unique hashset

Handling NA values in apply and unique

I have a 114 row by 16 column data frame where the rows are individuals, and the columns are either their names …

r unique apply