Find and replace using regex in Notepad++

Question

I am trying to figure out how to change these three lines in Notepad++ from this

foo('a');
foo('b');
foo('c');

to this

foo('a',new=>'4');
foo('b',new=>'4');
foo('c',new=>'4');

//(foo)(

Answer 1

1. Go to the Menu Bar, then Search, then Replace.
2. Ensure that "Search Mode" is set to regex.
3. Enter the following into "Find what": \\\\)
4. Enter the following into "Replace with": \\\\, new=>\\'4\\'\\)
5. Press the "Replace All" button