TIL: Numeric Increment and Decrement in Vim
You can use <C-a> and <C-x> (Ctrl-a and Ctrl-x) to increment or decrement a number under the cursor.
You can also specify a count, so for instance 10<C-a> increments by 10.
This even respects hex digits, if the number starts with 0x!
If you use these in visual mode, it will increment or decrement the first number of each selected line.
Even neater, if you use g<C-a> or g<C-x> in visual mode, it will bump the increment or decrement on each line, so you can quickly change this:
1.
1.
1.
into:
1.
2.
3.
These also accept a count, which changes the increment or decrement on each line, so for instance 2g<C-a> will change this:
1.
1.
1.
into:
1.
3.
5.