Category "unique"

Laravel: Feature test json validations unique rule issue

I recently started implementing the unit testing in Laravel 9.x framework. So far, I was able to write some basic rules without any complications. However, in m

How to select distinct value

I need to select all supervisor records. Our HR employee table set up like below Firstname Lastname Email Supervisor Frank Johns fjohns Taylor, Don Pat Hope ph

Unique comparable points at Java TreeSet

Having a very simple example of Java code: import java.util.*; class Point implements Comparable<Point>{ float x, y; Point(float x_, float y

How to get all possible combinations of array elements without duplicate

I have a vector of string elements vector = {'A','B','C'}. I want to generate all possible combination of the three elements of the array but without duplicate.

How to not remove but only print multiply rows from CSV file using a awk?

i have the following code awk -F, '{key=$1 FS $2 FS $3} NR==FNR{a[key]; next} !(key in a)' dubl.txt original.txt which checking for duplicates in multiply colu

How to print all the unique combinations of a list?

list_a = [1, 2, 3] I want to print all the unique combinations from the list like this [ [1], [2], [3], [1, 2], [1, 3], [2, 3], [1, 2, 3] ] Note: Without usin

Remove duplicate combinations in R [duplicate]

I am using R and I would like to remove combinations in a data.frame. Unique function does not seem to do the job. a b c 1 1 4 A 2 2 3 B 3

Date showing as serial number in formula

I'm currently having an issue with the date format. I have basically extracted the month and year from a standard dd/mm/yyyy date and wish this to be formatted

Java: Print a unique character in a string

I'm writing a program that will print the unique character in a string (entered through a scanner). I've created a method that tries to accomplish this but I ke

Teradata identity column and "Duplicate unique prime key error in dbname.tablename"

I created a table using the below definition for a Teradata identity column: ID INTEGER GENERATED BY DEFAULT AS IDENTITY (START WITH 1

Create a unique number with javascript time

I need to generate unique id numbers on the fly using javascript. In the past, I've done this by creating a number using time. The number would be made up of t

Django, show ValidationError in template

I create a registation app, where users can register providing a username, email and a password. What I did is make sure that the email field is unique(as you c