Confirmed Replace in Vim

Commands you practise

:s/{old}/{new}/gc

Replace text on the current line with interactive confirmation. Press y to accept a change or n to skip it, giving you total control.

:s/{old}/{new}/g

Replace every match on the current line in one stroke. The no-questions-asked sibling of the confirmed replace.

Levels

1. Selective Valves (easy): Selectively replace some 'x' elements with 'val' using confirmed substitution on the current line.
2. Row Moderation (medium): Navigate to the 'edit' lines and selectively substitute 'x' with 'val'. Do not alter the 'skip' lines.
3. Rhythmic Replication (hard): Mutate the uniform sequence of 'A's into a rhythmically growing pattern of 'T's.

Each level opens a real Neovim session in your browser with a start file and a target file. Edit one into the other in as few keystrokes as you can, then race the vimbot's solution.