How do i insert a line in front of a previous line using regex on notepad++?

Question

For example, I would like to following list:

E|MG000|HIST|062575|08012019|062575|MG003
L|22WBM3|1|1871.1
E|MG000|HIST|020590|31012019|020590|MG003
L|10B771D015|-4|8.488
E|MG000|HIST|062575|21022019|062575|MG003
L|22WBM3|-1|1871.1

to look like this:

E|MG000|HIST|062575|08012019|062575|MG003 - L|22WBM3|1|1871.1
E|MG000|HIST|020590|31012019|020590|MG003 - L|10B771D015|-4|8.488
E|MG000|HIST|062575|21022019|062575|MG003 - L|22WBM3|-1|1871.1

Answer 1

• Ctrl+H
• Find what: \R(?=L)
• Replace with: - (space hyphen space)
• CHECK Match case
• CHECK Wrap around
• CHECK Regular expression
• Replace all

Explanation:

\R          # any kind of linebreak
(?=         # positive lookahead, make sure we have after:
    L         # letter L
)           # end lookahead

Screenshot (before):

Screenshot (after):

Answer 2

Try (?m)^(E\|(?:(?!L\|).)+)\s+^(L\|.*(?:\r?\n)?)
Replace $1 - $2

demo