Nth Line of a Text

[layo]

I need a regular expression to match line 3 in some text. I have tried this:

\A(?:^.$\n){3}\K^.$

But that didn't work. Any ideas how I can match line 3?

[ComplexPoint]

See:

XY problem - Wikipedia

and

Tip: How Do I Get The Best Answer in the Shortest Time? - Tips & Tutorials - Keyboard Maestro Discourse

[tiffle]

Have a look at this macro that extracts any specified line from a list:

Get Line From List

This purpose of this subroutine is to extract a specific line from a list of items. So if you had a list of items e.g. Item 1 Item 2 Item 3 Item 4 and you ran this subroutine asking for line 2, the subroutine would return the value Item 2 Since it uses AppleScript at its heart, you can get the last item in the list by specifying -1; the next to last by specifying -2; and so on. By asking for line 0, the subroutine will return the count of the number of lines in the list. Here is the subro…

[ComplexPoint]

Keyboard Maestro directly supports:

• custom delimiters
• indexed segments of variables

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So, without adding a regular expression as a further problem:

Third line.kmmacros (3.4 KB)

[Zabobon]

@ComplexPoint

Keyboard Maestro directly supports:

• custom delimiters
• indexed segments of variables

It is a shame one of those delimiters cannot be directly a new line \n

(Although @peternlewis has hinted that this might be implemented one day...)

As a variation of of your solution I have been using the below a lot recently as it forces \n to work as a delimiter. It allows me to see at a glance that I am getting the nth line from a Variable).

EXAMPLE Get Line 3.kmmacros (3.7 KB)

EDIT - And it's worth pointing out that in this Keyboard Maestro native method the number in the square brackets can also be a Variable:

So, if a Variable LOCAL__Number was set to "4" it would get line 4.

%Variable%LOCAL__Variable(LOCAL__Number]\n%

Or in @ComplexPoint's version

%Variable %local_Delimited[LOCAL__Number]~,~%

[Nige_S]

If we're playing, here's one using shell script actions that will also return +ve and -ve (counting from the end) lines:

Get Line.kmmacros (6.3 KB)

Image

[ccstone]

@layo

But that didn't work. Any ideas how I can match line 3?

Hey Ross,

This question has come up a number of times on the forum. Here's one example:

Feature Request: Filter or Token: "nth Line"

Your regular expression above is not correct for the task at hand.

Here's one that works.

-Chris

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Capture 3rd Line of Textual Data v1.00.kmmacros (6.4 KB)

[layo]

Many thanks for your excellent help as usual.