# How to find duplicate rows in String Array (vec)

**URL:** <https://discourse.julialang.org/t/how-to-find-duplicate-rows-in-string-array-vec/49182>\
**Category:** General Usage\
**Created:** [October 28, 2020, 3:08pm UTC](https://discourse.julialang.org/t/how-to-find-duplicate-rows-in-string-array-vec/49182 "2020-10-28T15:08:57Z")\
**Posts on this page:** 3\
**Page:** 1

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**Author:** ![programista](https://sea2.discourse-cdn.com/julialang/user_avatar/discourse.julialang.org/programista/32/5372_2.png) [@programista](https://discourse.julialang.org/u/programista)\
**Post date:** [October 28, 2020, 3:08pm UTC](https://discourse.julialang.org/t/how-to-find-duplicate-rows-in-string-array-vec/49182/1 "2020-10-28T15:08:57Z")

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How to find duplicate rows in String Array (vec) ?

Paul

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**Author:** ![affans](https://sea2.discourse-cdn.com/julialang/user_avatar/discourse.julialang.org/affans/32/11911_2.png) [@affans](https://discourse.julialang.org/u/affans)\
**Post date:** [October 28, 2020, 3:57pm UTC](https://discourse.julialang.org/t/how-to-find-duplicate-rows-in-string-array-vec/49182/2 "2020-10-28T15:57:03Z")

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What do you want to do? You can use `unique` to only get a vector back without duplicate elements.

```julia
julia> aa = ["cat", "dog", "dog"]
3-element Array{String,1}:
 "cat"
 "dog"
 "dog"

julia> unique(aa)
2-element Array{String,1}:
 "cat"
 "dog"

```

or you can use `countmap` from `StatsBase.jl` to get a dictionary back to see which element is duplicated.

```julia
julia> countmap(aa)
Dict{String,Int64} with 2 entries:
  "cat" => 1
  "dog" => 2

```

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<div class="post-metadata">

**Author:** ![programista](https://sea2.discourse-cdn.com/julialang/user_avatar/discourse.julialang.org/programista/32/5372_2.png) [@programista](https://discourse.julialang.org/u/programista)\
**Post date:** [November 3, 2020, 1:01pm UTC](https://discourse.julialang.org/t/how-to-find-duplicate-rows-in-string-array-vec/49182/3 "2020-11-03T13:01:02Z")

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Thanks, 😉