# Get all combinations

**URL:** <https://discourse.julialang.org/t/get-all-combinations/27461>\
**Category:** New to Julia\
**Created:** [August 12, 2019, 2:27pm UTC](https://discourse.julialang.org/t/get-all-combinations/27461 "2019-08-12T14:27:45Z")\
**Posts on this page:** 7\
**Page:** 1

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**Author:** ![1112](https://sea2.discourse-cdn.com/julialang/user_avatar/discourse.julialang.org/1112/32/9325_2.png) [@1112](https://discourse.julialang.org/u/1112)\
**Post date:** [August 12, 2019, 2:27pm UTC](https://discourse.julialang.org/t/get-all-combinations/27461/1 "2019-08-12T14:27:45Z")

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Hello, tell me what are the methods for enumerating all the combination of characters.  
I have such a line.  
“ABC1abc”  
I want to get this as a result  
Abc  
ABC  
CBA  
C1A  
BC1  
…

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**Author:** ![simeonschaub](https://sea2.discourse-cdn.com/julialang/user_avatar/discourse.julialang.org/simeonschaub/32/216566_2.png) [@simeonschaub](https://discourse.julialang.org/u/simeonschaub)\
**Post date:** [August 12, 2019, 3:05pm UTC](https://discourse.julialang.org/t/get-all-combinations/27461/2 "2019-08-12T15:05:26Z")

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Are you looking for:

```julia
julia> s = "ABC1abc"
"ABC1abc"

julia> join.(Iterators.product(s,s,s))
7×7×7 Array{String,3}:
[:, :, 1] =
 "AAA" "ABA" "ACA" "A1A" "AaA" "AbA" "AcA"
 "BAA" "BBA" "BCA" "B1A" "BaA" "BbA" "BcA"
 "CAA" "CBA" "CCA" "C1A" "CaA" "CbA" "CcA"
 "1AA" "1BA" "1CA" "11A" "1aA" "1bA" "1cA"
 "aAA" "aBA" "aCA" "a1A" "aaA" "abA" "acA"
 "bAA" "bBA" "bCA" "b1A" "baA" "bbA" "bcA"
 "cAA" "cBA" "cCA" "c1A" "caA" "cbA" "ccA"

[:, :, 2] =
 "AAB" "ABB" "ACB" "A1B" "AaB" "AbB" "AcB"
 "BAB" "BBB" "BCB" "B1B" "BaB" "BbB" "BcB"
 "CAB" "CBB" "CCB" "C1B" "CaB" "CbB" "CcB"
 "1AB" "1BB" "1CB" "11B" "1aB" "1bB" "1cB"
 "aAB" "aBB" "aCB" "a1B" "aaB" "abB" "acB"
 "bAB" "bBB" "bCB" "b1B" "baB" "bbB" "bcB"
 "cAB" "cBB" "cCB" "c1B" "caB" "cbB" "ccB"

[:, :, 3] =
 "AAC" "ABC" "ACC" "A1C" "AaC" "AbC" "AcC"
 "BAC" "BBC" "BCC" "B1C" "BaC" "BbC" "BcC"
 "CAC" "CBC" "CCC" "C1C" "CaC" "CbC" "CcC"
 "1AC" "1BC" "1CC" "11C" "1aC" "1bC" "1cC"
 "aAC" "aBC" "aCC" "a1C" "aaC" "abC" "acC"
 "bAC" "bBC" "bCC" "b1C" "baC" "bbC" "bcC"
 "cAC" "cBC" "cCC" "c1C" "caC" "cbC" "ccC"

[:, :, 4] =
 "AA1" "AB1" "AC1" "A11" "Aa1" "Ab1" "Ac1"
 "BA1" "BB1" "BC1" "B11" "Ba1" "Bb1" "Bc1"
 "CA1" "CB1" "CC1" "C11" "Ca1" "Cb1" "Cc1"
 "1A1" "1B1" "1C1" "111" "1a1" "1b1" "1c1"
 "aA1" "aB1" "aC1" "a11" "aa1" "ab1" "ac1"
 "bA1" "bB1" "bC1" "b11" "ba1" "bb1" "bc1"
 "cA1" "cB1" "cC1" "c11" "ca1" "cb1" "cc1"

[:, :, 5] =
 "AAa" "ABa" "ACa" "A1a" "Aaa" "Aba" "Aca"
 "BAa" "BBa" "BCa" "B1a" "Baa" "Bba" "Bca"
 "CAa" "CBa" "CCa" "C1a" "Caa" "Cba" "Cca"
 "1Aa" "1Ba" "1Ca" "11a" "1aa" "1ba" "1ca"
 "aAa" "aBa" "aCa" "a1a" "aaa" "aba" "aca"
 "bAa" "bBa" "bCa" "b1a" "baa" "bba" "bca"
 "cAa" "cBa" "cCa" "c1a" "caa" "cba" "cca"

[:, :, 6] =
 "AAb" "ABb" "ACb" "A1b" "Aab" "Abb" "Acb"
 "BAb" "BBb" "BCb" "B1b" "Bab" "Bbb" "Bcb"
 "CAb" "CBb" "CCb" "C1b" "Cab" "Cbb" "Ccb"
 "1Ab" "1Bb" "1Cb" "11b" "1ab" "1bb" "1cb"
 "aAb" "aBb" "aCb" "a1b" "aab" "abb" "acb"
 "bAb" "bBb" "bCb" "b1b" "bab" "bbb" "bcb"
 "cAb" "cBb" "cCb" "c1b" "cab" "cbb" "ccb"

[:, :, 7] =
 "AAc" "ABc" "ACc" "A1c" "Aac" "Abc" "Acc"
 "BAc" "BBc" "BCc" "B1c" "Bac" "Bbc" "Bcc"
 "CAc" "CBc" "CCc" "C1c" "Cac" "Cbc" "Ccc"
 "1Ac" "1Bc" "1Cc" "11c" "1ac" "1bc" "1cc"
 "aAc" "aBc" "aCc" "a1c" "aac" "abc" "acc"
 "bAc" "bBc" "bCc" "b1c" "bac" "bbc" "bcc"
 "cAc" "cBc" "cCc" "c1c" "cac" "cbc" "ccc"

```

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<div class="post-metadata">

**Author:** ![1112](https://sea2.discourse-cdn.com/julialang/user_avatar/discourse.julialang.org/1112/32/9325_2.png) [@1112](https://discourse.julialang.org/u/1112)\
**Post date:** [August 28, 2019, 10:34am UTC](https://discourse.julialang.org/t/get-all-combinations/27461/3 "2019-08-28T10:34:01Z")

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Please tell me how to combine this array into one one-dimensional? To get this:Array{String,1}

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**Author:** ![Tamas\_Papp](https://sea2.discourse-cdn.com/julialang/user_avatar/discourse.julialang.org/tamas_papp/32/25949_2.png) [@Tamas\_Papp](https://discourse.julialang.org/u/Tamas_Papp)\
**Post date:** [August 28, 2019, 10:45am UTC](https://discourse.julialang.org/t/get-all-combinations/27461/4 "2019-08-28T10:45:13Z")

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`vec`

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<div class="post-metadata">

**Author:** ![1112](https://sea2.discourse-cdn.com/julialang/user_avatar/discourse.julialang.org/1112/32/9325_2.png) [@1112](https://discourse.julialang.org/u/1112)\
**Post date:** [August 28, 2019, 10:46am UTC](https://discourse.julialang.org/t/get-all-combinations/27461/5 "2019-08-28T10:46:57Z")

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Thank you!

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<div class="post-metadata">

**Author:** ![stevengj](https://sea2.discourse-cdn.com/julialang/user_avatar/discourse.julialang.org/stevengj/32/71_2.png) [@stevengj](https://discourse.julialang.org/u/stevengj)\
**Post date:** [August 28, 2019, 12:26pm UTC](https://discourse.julialang.org/t/get-all-combinations/27461/6 "2019-08-28T12:26:21Z")

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> [@1112](#):
>
> Hello, tell me what are the methods for enumerating all the combination of characters.

You can also use the [GitHub - JuliaMath/Combinatorics.jl: A combinatorics library for Julia](https://github.com/JuliaMath/Combinatorics.jl) package, which has a function `combinations` for iterating combinations.

```julia
julia> using Combinatorics

julia> [join(x) for x in combinations("ABC1abc", 3)]
35-element Array{String,1}:
 "ABC"
 "AB1"
 "ABa"
 "ABb"
 "ABc"
 "AC1"
 ⋮
 "Cbc"
 "1ab"
 "1ac"
 "1bc"
 "abc"

```

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<div class="post-metadata">

**Author:** ![1112](https://sea2.discourse-cdn.com/julialang/user_avatar/discourse.julialang.org/1112/32/9325_2.png) [@1112](https://discourse.julialang.org/u/1112)\
**Post date:** [August 28, 2019, 12:55pm UTC](https://discourse.julialang.org/t/get-all-combinations/27461/7 "2019-08-28T12:55:31Z")

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Thanks for the feedback. I think your decision suits me better