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#25 - Remove consecutive duplicate words CodeWars Kata (7 kyu)

Cesar Del rio on January 25, 2022

Instructions Your task is to remove all consecutive duplicate words from a string, leaving only first words entries. For example: In...

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This one you can solve with a single RegExp:

const removeConsecutiveDuplicates =
  (input) => input.replace(/(\w+) \1/g, "$1")
// \1 matches the last match made with (\w+)

Yeah, but backreferences are evil. ;)

Still pretty effective, especially in this case. ;)

I don't know too much about regex, I think I need to do some research about it 😅
what does the "$1" do?

It inserts the first match inside brackets.

Oh right, so it just leaves the first match and the other one gets replaced, am I rigth?

Exactly.

cool 🔥

What a conversation of genius, well donne guys !

Thanks bro 🙌

Great Solution, I didn't know that you could call the filtered array as a parameter! 🙌