Command to search ignoring case and when change, change matching item case

[otavioschwanck]

Describe your request

In this scenario:

doomEmacs
setDoomEmacs

if i match press M-d twice on doomEmacs, also selects the DoomEmacs.

Then i change to somethingElse.

Final result:

somethingElse
setSomethingElse

Maybe this can be a variable or have a function to toggle it

Briefly explain its use-case

every camel case language should have benefits from it.