reset sequence of numbers

Question

I have 50 lines of code

private const CODE = 0;
private const DESC = 1;
// ... 
private const TRIM = 19; // instead of 24
private const SMURF = 35; // instead of 25
private const DOG = 31; // instead of 26
// ... 
private const CAT = 49;
private const AMOUNT = 50;

As you can see, numbers are not sorted right. I'd like to rewrite them so that I get the following instead:

private const CODE = 0;
private const DESC = 1;
// ... 
private const TRIM = 24;
private const SMURF = 25;
private const DOG = 26;
// ... 
private const CAT = 49;
private const AMOUNT = 50;

Answer 1

Assume there has no negative numbers.

let @"=-1 | global /\v\w+\s*\=\s*\d+\s*;/ exec("normal! f;bviwp\<c-a>yiw")

• let @"=-1 set register " to -1
• global /\v\w+\s*\=\s*\d+\s*;/ find all line that need to be changed
  • \w+\s*\=\s* match "CODE = " in "CODE = 0;"
  • \d+\s*; match "0;" in "CODE = 0;"
• exec("normal! f;bviwp\<c-a>yiw") execute a tiny script on each matched line:
  • f;b locate cursor at number before ;
  • viwp replace current number with register "
  • \<c-a> increase current number
  • yiw set register " to current number

Answer 2

What you can do is the following.

Prepare: Execute :set virtualedit=block. This allows visual block selection (<Ctrl-V>) beyond the end of line.

1. Visually select the lines and execute :'<,'>s/=.*$// (this also deletes all trailing comments!)
2. Go to the end of the first line and hit <C-V> and move down over all 50 lines and to the right, so the right side of the visual box is behind all variable names.
3. Enter A= 0;<esc>, to append the text = 0; to all lines.
4. Go to the second line and move to the 0.
5. Hit <C-V> again and move down to the last line. You have now one column visually selected.
6. Hit g<Ctrl-A>. This will replace the 0s with a increasing sequence of numbers.

Answer 3

1. At first make every digit zero:

   :%s/\vprivate const .* = \zs\d*\ze;/0/g
   

2. Then goto the first line with gg

3. Then start recording. Just press q twice, i.e. qq. The first q will start the recording and the second q will define in which register (:reg q) the recording will be stored.
4. Goto the digit before ; by pressing t;
5. Yank the integer with yiw
6. Go one line below, goto before ; and put the integer in place of the zero there and increment. The whole process should be done by j0t;viw"0p<Ctrl-A>
7. Stop recording by pressing q once.
8. Perform the task from 4 to 7 with 50@q