How do you change the case of text stored in a register?
:let @a = toupper(@a)
Use Vimscript functions toupper() or tolower() with :let @a = toupper(@a) to convert the case of the entire register contents.
Tag: convert
How do you use a macro to convert single quotes to double quotes?
qaf'r"q
Record a macro that finds the next single quote with f' and replaces it with a double quote using r".
How do you record a macro to convert 4-space indentation to 2-space?
qa:s/^ / /\njq
Record a macro that substitutes leading 4-space indentation with 2 spaces on each line.
How do you record a macro to convert a list of items into an array literal?
qaI"<Esc>A",<Esc>jq
Record a macro that wraps each line in quotes and adds a trailing comma.