Why I am not getting the three mentions but the first one repeated twice?
console.log(/(@[\w]+)/g.exec('i am mentioning @user1 and @user2 and @user3'))
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Jose Ospina
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Also, note that `[\w]+` can be shortened to `\w+`. No need to wrap it in `[]` – ctwheels May 03 '18 at 13:52
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You may want to use `String#match` instead. – 31piy May 03 '18 at 13:56
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I need the index of each match, I immagine I would need to loop regex – Jose Ospina May 03 '18 at 13:57
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The duplicate answers your title, the answer to your question is this: the parenthesis are superfluous. You create a group by using them and match returns the matching string followed by all groups. That's why it is repeated twice. Remove them on you only get the matching string `/@[\w]+/g` – Prinzhorn May 03 '18 at 13:59