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 @wangyouming1209:

Unlock 12 remaining solutions by signing in and submitting your own entry
Created by: @johnreitano

1468 active golfers, 5977 entries

Solutions by @wangyouming1209:
10
#151 - 王有铭 / @wangyouming1209

05/22/2020 at 08:18AM

10
#>151 - 王有铭 / @wangyouming1209

05/22/2020 at 08:20AM

10
#>277 - 王有铭 / @wangyouming1209

09/02/2020 at 03:22AM

10
#>279 - 王有铭 / @wangyouming1209

09/03/2020 at 03:27AM

11
#>524 - 王有铭 / @wangyouming1209

05/22/2020 at 08:16AM

12
#>733 - 王有铭 / @wangyouming1209

05/22/2020 at 08:15AM

13
#>776 - 王有铭 / @wangyouming1209

05/22/2020 at 08:15AM

14
#>816 - 王有铭 / @wangyouming1209

05/22/2020 at 08:13AM

15
#>891 - 王有铭 / @wangyouming1209

05/22/2020 at 08:12AM

15
#>916 - 王有铭 / @wangyouming1209

09/03/2020 at 03:27AM

16
#>969 - 王有铭 / @wangyouming1209

05/22/2020 at 08:11AM

17
#>1053 - 王有铭 / @wangyouming1209

05/22/2020 at 08:05AM