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Hello folks. I am stuck in a problem where I must pair objects of an array with unique partners.

I have one array.

I must pair each element to each other.

Incorrect pairing algorithm would result with repetitions, and pairing with itself.

e.g.

`String[] codesArray = {"A", "B", "C"};`

For this array (codesArray), the pairing (correct output) would be:

```
/*
Correct:
A-B
A-C
B-C
*/
```

My attempt,

I have tried to do a 2-nested forloop:

```
for each element i in codesArray
for each element j in codesArray
pairThese(i,j)
```

...which gives me the incorrect output.

Incorrect output:

```
/*
Wrong:
A-A //Can't pair with itself.
A-B
A-C
B-A //Already paired previously.
B-B //Can't pair with itself.
B-C
C-A //Already paired previously.
C-B //Already paired previously.
C-C //Already paired previously.
*/
```

**How would I be able to implement an algorithm to achieve the correct output?**

(Also, I realise that this might be a common problem. What would I search for in order to find similar problems? Key words?)

Cheers.

*Edited 5 Years Ago by thompsonSensibl*: n/a