---
name: "Array.nub"
section: "3kaya"
platform: "linux"
package: "kaya"
version: "0.4.4-6.2"
release: "Debian 8 (Jessie)"
platforms: ["linux"]
url: "https://new.carta.tech/Array.nub"
---

# Array.nub(3kaya)

Remove repeated elements from a list.

## NAME

Array::nub - Remove repeated elements from a list.

## SYNOPSIS

**Void nub(** *var \[a\] xs, Bool(a, a) eq=equal* **)**

## ARGUMENTS

**xs** The list

**eq** Optionally, the equality test. Defaults to **Builtins.equal (3kaya)**

## DESCRIPTION

Remove repeated elements from a list in-place. Repeated elements will be removed whether adjacent or not.

-

   xs = \[1,2,3,3,1,2,4,5,2,2,1\];\
    nub(xs);\
    // xs = \[1,2,3,4,5\]

The name 'nub', incidentally, is borrowed from the Haskell prelude function of the same name, and suggests 'essence'.

## AUTHORS

Kaya standard library by Edwin Brady, Chris Morris and others (kaya@kayalang.org). For further information see http://kayalang.org/

## LICENSE

The Kaya standard library is free software; you can redistribute it and/or modify it under the terms of the GNU Lesser General Public License (version 2.1 or any later version) as published by the Free Software Foundation.