How to duplicate 100 unique lines in Sublime Text?

Question

Sublime Text

There is such data:

string 1
string 2
string 3
...
string 1000

I want to get these:

string 1
string 1
string 2
string 2
string 3
string 3
...
string 1000
string 1000

Who knows how to do it?

Answer 1

1. Ctrl+F
2. Alt+R (If regular expression search is not active)
3. In the search bar, enter the regular expression .*
4. Press Alt+Enter
5. Ctrl+C
6. Press the right arrow to get rid of the selection and leave only cursors at the end of lines
7. Enter
8. Ctrl+V