append things to the end of a pattern

Question

I have several instances of variables in a file and I need to modify the variable and append "new" to each of the names.

var Modelfrfr = ....

var Modeldede = ...

var Modelenen = ...

change it to

var ModelfrfrNew = ....

var ModeldedeNew = ...

var ModelenenNew = ...

What is the best way to do it?

Answer 1

Kind of this

%s/Model\a\+/&New/g

See :h :s, :h /\a, :h sub-replace-special and so on.

Answer 2

With the cursor on the first line at the first column, the command t=<C-v>2jINew<Esc> where:

1. t= moves the cursor to immediately before the first =.
2. <C-v> for visual block mode.
3. 2j to select the two lines beneath. Replace the 2 with any number or press j until the cursor has selected the desired number of lines.
4. I for insert mode.
5. New for the desired text to append to all of the variables.
6. <Esc> to exit insert mode and apply the text to all lines in the selection.

Edit

In retrospect, that will only work for a solid block of variables. If they're spaced throughout a file, maybe a macro? qq/var<CR>eeaNew<Esc>q

1. qq to start the macro in register q
2. /var<CR> to search for var.
3. ee to move to the end of the variable name.
4. aNew to append "New".
5. <Esc>q to exit insert mode and stop recording the macro.

Repeat with @q as needed.

Hope that helps!