unique Archives - IT Nursery

How do I count occurrence of unique values inside a list

So I’m trying to make this program that will ask the user for input and store the values in an array / list. … Read more

Find the unique values in a column and then sort them

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I have a pandas dataframe. I want to print the unique values of one of its columns in ascending order. This is how … Read more

Postgres unique constraint vs index

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As I can understand documentation the following definitions are equivalent: create table foo ( id serial primary key, code integer, label text, constraint … Read more

Find unique rows in numpy.array

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I need to find unique rows in a numpy.array. For example: >>> a # I have array([[1, 1, 1, 0, 0, 0], [0, … Read more

In Postgresql, force unique on combination of two columns

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I would like to set up a table in PostgreSQL such that two columns together must be unique. There can be multiple values … Read more

Select unique or distinct values from a list in UNIX shell script

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I have a ksh script that returns a long list of values, newline separated, and I want to see only the unique/distinct values. … Read more

Generate ‘n’ unique random numbers within a range [duplicate]

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This question already has answers here: Generate three different random numbers [duplicate] (2 answers) Closed 8 years ago. I know how to generate … Read more

How to get distinct values from an array of objects in JavaScript?

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Assuming I have the following: var array = [ {“name”:”Joe”, “age”:17}, {“name”:”Bob”, “age”:17}, {“name”:”Carl”, “age”: 35} ] What is the best way to … Read more