NoneUniq is a Unix/POSIX/Linux utility to remove or filter duplicate lines from a sorted file. It is also the name of a method to remove duplicates from an array in Ruby.

uniq is a Unix/POSIX/Linux utility to remove or filter duplicate lines from a sorted file. It is typically applied to the output of sort.

In Ruby ruby, uniq is a method of the Array class to remove duplicates from an array. uniq creates a new array whereas uniq! modifies the array in place.

For questions about unique identifiers, keys, names, etc., see unique or more specific tags such as unique-constraint, unique-index, unique-key, unique-ptr, etc.

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