Real Vim ninjas count every keystroke - do you?

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

Changelog, Rules & FAQ, updates: @vimgolf, RSS.

Your VimGolf key: please sign in

$ gem install vimgolf
$ vimgolf setup
$ vimgolf put 56a260eedb173f2f5d00f6f8

JS notation to Immutable.js notation

Now Immutable.js made its way into many frontends. This challenge consists of a typical refactoring that many of us are facing now.

Start file

lines[1][1] = 'hello'
lines[2][0] = 'world'
lines[3][1] = 'whats'
lines[10][2] = 'going'
lines[12][1] = 'on'

End file

lines
        .setIn([1, 1], 'hello')
        .setIn([2, 0], 'world')
        .setIn([3, 1], 'whats')
        .setIn([10, 2], 'going')
        .setIn([12, 1], 'on')

View Diff

1,5c1,6
< lines[1][1] = 'hello'
< lines[2][0] = 'world'
< lines[3][1] = 'whats'
< lines[10][2] = 'going'
< lines[12][1] = 'on'
---
> lines
>       .setIn([1, 1], 'hello')
>       .setIn([2, 0], 'world')
>       .setIn([3, 1], 'whats')
>       .setIn([10, 2], 'going')
>       .setIn([12, 1], 'on')

Solutions by @lelandpaul:

Created by: @TimSuchanek Tweet

63 active golfers, 186 entries

Solutions by @lelandpaul: