# Union() - Remove duplicates for multi-dimensional array

**URL:** <https://discourse.julialang.org/t/union-remove-duplicates-for-multi-dimensional-array/94894>\
**Category:** General Usage\
**Tags:** array\
**Created:** [February 20, 2023, 3:01am UTC](https://discourse.julialang.org/t/union-remove-duplicates-for-multi-dimensional-array/94894 "2023-02-20T03:01:08Z")\
**Posts on this page:** 1\
**Page:** 1

<div class="post-metadata">

**Author:** ![Students](https://sea2.discourse-cdn.com/julialang/user_avatar/discourse.julialang.org/students/32/46015_2.png) [@Students](https://discourse.julialang.org/u/Students)\
**Post date:** [February 20, 2023, 3:01am UTC](https://discourse.julialang.org/t/union-remove-duplicates-for-multi-dimensional-array/94894/1 "2023-02-20T03:01:08Z")

</div>

Hello,

Could you please help me to extend the union() for a multidimensional array? Remove duplicate if all the cols match.

Eg : [[0.0, 0.0, 150.0, 300.0, 350.0], [1040.0, 1040.0, 1040.0, 1040.0, 1020.0]] —\> [[0.0, 150.0, 300.0, 350.0], [1040.0, 1040.0, 1040.0, 1020.0]]

Thank!