Real Vim ninjas count every keystroke - do you?

Pick a challenge, fire up Vim, and show us what you got.

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$ gem install vimgolf
$ vimgolf setup
$ vimgolf put 5e4dfcccaa2db400090b66c3

prepend * to every non-blank line

Prepend an asterisk to every non-blank line in the input file.

Start file

This is a
very short

file, but it is 
still
full

of

surpises.

End file

*This is a
*very short

*file, but it is 
*still
*full

*of

*surpises.

View Diff

1,2c1,2
< This is a
< very short
---
> *This is a
> *very short
4,6c4,6
< file, but it is 
< still
< full
---
> *file, but it is 
> *still
> *full
8c8
< of
---
> *of
10c10
< surpises.
---
> *surpises.

Solutions by @qnleroy:

Created by: @johnreitano Tweet

1517 active golfers, 6208 entries

Solutions by @qnleroy:

10

#125 - Quentin Leroy / @qnleroy

05/07/2020 at 01:56PM

11

#>520 - Quentin Leroy / @qnleroy

05/07/2020 at 01:52PM

12

#>763 - Quentin Leroy / @qnleroy

05/07/2020 at 01:51PM

12

#>763 - Quentin Leroy / @qnleroy

05/07/2020 at 01:51PM

13

#>810 - Quentin Leroy / @qnleroy

05/07/2020 at 01:52PM

14

#>845 - Quentin Leroy / @qnleroy

05/07/2020 at 01:45PM

15

#>923 - Quentin Leroy / @qnleroy

05/07/2020 at 01:38PM

16

#>1009 - Quentin Leroy / @qnleroy

05/07/2020 at 12:47PM

16

#>1009 - Quentin Leroy / @qnleroy

05/07/2020 at 01:30PM

16

#>1009 - Quentin Leroy / @qnleroy

05/07/2020 at 01:32PM

16

#>1009 - Quentin Leroy / @qnleroy

05/07/2020 at 01:32PM

16

#>1009 - Quentin Leroy / @qnleroy

05/07/2020 at 01:32PM

17

#>1093 - Quentin Leroy / @qnleroy

05/07/2020 at 04:23AM

17

#>1093 - Quentin Leroy / @qnleroy

05/07/2020 at 04:25AM

17

#>1093 - Quentin Leroy / @qnleroy

05/07/2020 at 01:34PM

18

#>1144 - Quentin Leroy / @qnleroy

05/07/2020 at 04:22AM

18

#>1144 - Quentin Leroy / @qnleroy

05/07/2020 at 01:45PM

20

#>1241 - Quentin Leroy / @qnleroy

05/07/2020 at 04:21AM