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Removing duplicate values in a text-field


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Hello there!

I've searched the forums but couldn't find any solution.

I have a text-field that contains a list of values. Like this for example:

1

2

2

3

3

4

Now I want to remove all duplicate values so that I get a list like this:

1

2

3

4

But I'm kind of lost right now, so any help -- even a little push into the right direction -- would be greatly appreciated.

Thanks,

Ralph

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