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 52222f6ea98cbe0002000078

Letter case trickery

This file is in a downright esoteric format, consisting of hexadecimal numbers, non-hexadecimal keywords, and "Z" indicating end-of-line. Make the hexadecimal numbers lowercase.

Start file

A4E SUM 3C0Z
2B A9 NE F2Z

End file

a4e SUM 3c0Z
2b a9 NE f2Z

View Diff

1,2c1,2
< A4E SUM 3C0Z
< 2B A9 NE F2Z
---
> a4e SUM 3c0Z
> 2b a9 NE f2Z

Solutions by @fishlovebanana:

Created by: @NbTson Tweet

511 active golfers, 1594 entries

Solutions by @fishlovebanana:

9

#21 - fucus / @fishlovebanana

08/12/2018 at 03:10AM

10

#>158 - fucus / @fishlovebanana

08/12/2018 at 03:09AM

11

#>284 - fucus / @fishlovebanana

08/12/2018 at 03:07AM

11

#>284 - fucus / @fishlovebanana

08/12/2018 at 03:08AM

11

#>284 - fucus / @fishlovebanana

08/12/2018 at 03:08AM

12

#>352 - fucus / @fishlovebanana

08/12/2018 at 03:05AM

13

#>408 - fucus / @fishlovebanana

08/12/2018 at 03:04AM

14

#>436 - fucus / @fishlovebanana

08/12/2018 at 03:03AM

16

#>457 - fucus / @fishlovebanana

08/12/2018 at 03:01AM

17

#>470 - fucus / @fishlovebanana

08/12/2018 at 02:59AM

17

#>470 - fucus / @fishlovebanana

08/12/2018 at 03:00AM

20

#>493 - fucus / @fishlovebanana

08/12/2018 at 02:58AM

22

#>500 - fucus / @fishlovebanana

08/12/2018 at 02:58AM

27

#>504 - fucus / @fishlovebanana

08/12/2018 at 02:57AM

37

#>509 - fucus / @fishlovebanana

08/12/2018 at 02:55AM