How to find the first space in all lines?

[Emalino Emalero]

I have a txt file with more than 3 thousand lines, I want to detect the first space in all lines and add a ]
Original file format

[fgggj oooo m6cmp5
[5jgidd udd64j kkrt7 8d66sdjnd
[hfhfh maoerchgu 996d63542
[mmnkiiuy45 oiudzzc3

Would be like this

[fgggj]oooo m6cmp5
[5jgidd]udd64j kkrt7 8d66sdjnd
[hfhfh]maoerchgu 996d63542
[mmnkiiuy45]oiudzzc3

Next, use a regex that eliminates everything outside []

Final result

[fgggj]
[5jgidd]
[hfhfh]
[mmnkiiuy45]

It’s possible? Thank you for any help.

[Coises]

@Emalino-Emalero

Find what : ^(\S++)[^\r\n]++
Replace with : $1]

[Emalino Emalero]

Thank you very much, Coises. It worked perfectly, saved my weekend! I applied the regex, using Linux Debian Sid, Notepad++ running via wine. Sorted out!

[Emalino Emalero]

Sorry to bother you, but I have a question that I may need in the future. If I wanted to do the opposite, in the end result removing everything inside [] including [] itself, would it be possible? The end result would be this:

oooo m6cmp5
udd64j kkrt7 8d66sdjnd
maoerchgu 996d63542
oiudzzc3

[Coises]

@Emalino-Emalero said in How to find the first space in all lines?:

Sorry to bother you, but I have a question that I may need in the future. If I wanted to do the opposite, in the end result removing everything inside [] including [] itself, would it be possible? The end result would be this:

Find what : ^(\S++)\h
Replace with : (empty)

[Emalino Emalero]

Thanks!