Question

In Vim, one can join two lines by typing capital J.
However, these are usually joined by a space.

I seem to remember there was a way to change the character used for the joining by setting some variable, but I can’t seem to find it again.

I’d appreciate it if anyone could remind me, or confirm that it can’t be done.

Answer 1

When I want to join just a few lines I use a 3 keys combo (normal mode):

Jr,

being , the joining character.

In case I want to join more lines or even join lines in groups, I use the previous combo with a macro.

For example, to transform 3 lines in a 3 columns CSV table, I record this macro (assigned to letter j of course):

qjJr,Jr,jq

So, using @j joins 3 lines using , and goes to the next line.

10@j converts 10 lines.