Regex in Notepad++

Question

Hi all,

I have a range of files of a specific format. I have pasted an example here.

----------------------------------------------
Attempting to factor n = 160000000000110400000000018963... Found a factor: 400000000000129
Time (s): 18.9561
----------------------------------------------
Attempting to factor n = 164025000000137700000000028819... Found a factor: 405000000000179
Time (s): 22.3426
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Attempting to factor n = 168100000000155800000000036051... Found a factor: 410000000000197
Time (s): 101.183

I would like a regular expression that I can use to capture the times, e.g. for all the lines with format "Time (s): X.Y" I want to keep X.Y on a seperate line, and throw EVERYTHING ELSE away.

I have the following expression: Time (s)\:\s+(\d+.\d+), which captures these. This captures the lines I need, but Notepad++ only seems to have functionality to replace with something, not save what it matches. So I can remove all those lines, which is nearly the opposite of what I want.

Any help?

Answer 1

Use this on the command line:

for /f "usebackq tokens=3" %a in (`findstr /b "Time" 1.txt`) do @echo %a

Answer 2

Well I don't know Noteplad++ but its likely that you can use the result of capture groups in the replacement field. Either try

\1

or

$1

1 = first capture group. So you basically replace the whole line with \2 in your case.

Answer 3

Use the following expression to match the entire line:

.*\(s\)\:\s+(\d+.\d+)

Now you can replace this with

\1

which gives you the matched group number 1 (the only group in the above expression) that matches the time