Forums Scripts & Popups Delete repeated words Regex?

I want to delete repeated words with Reg(sub)ex?
Example: Nickname1 Nickname2 Nickname3 Nick1
Return: Nickname1 Nickname2 Nickname3

this seems to work for me:

Simo's code doesn't work correctly, your example is also incorrect as it doesn't contain the same word twice. Here is something that works, it deletes from the left:

//echo -a $regsubex(Nickname1 Nickname1 Nickname2 Nickname3 Nickname2 Nickname1,/(?:\G| )([^ ]+) (?=(?:\1|.* \1)(?: |$))/gSi,)

Hi @Wims

While deleting the second repetition, it merges it with the other value. See;

//echo -a $regsubex(Nickname1 Nickname3 NickName2 Nickname2 Nickname1,/(?:\G| )([^ ]+) (?=(?:\1|.* \1)(?: |$))/gSi,)


Return: Nickname3Nickname2 Nickname1

try this :

Nice catch, here is a simple fix:

//echo -a $regsubex(Nickname1 Nickname3 NickName2 Nickname2 Nickname1,/(?<=\G| )([^ ]+) (?=(?:\1|.* \1)(?: |$))/gSi,)

@Simo: you're replacing the match with a space, but we're trying to get rid of extra space when deleting a word, not add more, it was deleting a space incorrectly because the first part (?:\G| ) consume the space incorrectly on the left of the word, by making this part a positive lookbehind, it's no longer consumed. Note that it's possible to deal with this with a sexy \K as well

//echo -a $regsubex(Nickname1 Nickname3 NickName2 Nickname2 Nickname1,/(?:\G| )\K([^ ]+) (?=(?:\1|.* \1)(?: |$))/gSi,)In fact this \K technique is required with PCRE, had OP's requirement be to match non fixed length stuff.

excellent thanks for the explanation and clarification Wims as you noticed im by no means a wizard of regex.