including newlines in a .sub

[Alan Munn]

Hi, I'm new to ruby, and am having trouble with the following (\n is
newline on a Mac).

e.g.

line = "foo bar"
line = line.sub(/ /, '\n')
puts line

This produces:

foo\nbar

when what I want (and expected) was:

foo
bar

(This is just a toy example; I don't actually want to split lines on
spaces.) What I don't understand is how to insert a true newline into a
string so that it outputs as such.

Thanks

Alan

 

[Sebastian Hungerecker]

Am Montag 20 Juli 2009 21:30:06 schrieb Alan Munn:

line = line.sub(/ /, '\n')

In ruby "\n" is a newline, while '\n' is backslash followed by an n.

HTH,
Sebastian

 

[Alan Munn]

Am Montag 20 Juli 2009 21:30:06 schrieb Alan Munn:

In ruby "\n" is a newline, while '\n' is backslash followed by an n.

Perfect. Thanks. I had tried that with my more complicated example
(which included reference to capture groups from the regex) and it
didn't work, but now I realise I need to concatenate the pieces together
with a mix of single and double quotes to get it to work.

Alan

 

[Sebastian Hungerecker]

Am Montag 20 Juli 2009 22:05:05 schrieb Alan Munn:

Perfect. Thanks. I had tried that with my more complicated example
(which included reference to capture groups from the regex) and it
didn't work, but now I realise I need to concatenate the pieces together
with a mix of single and double quotes to get it to work.

Well you could also use double quotes exclusively and use \\1, \\2 etc. to
refer to the captures.

HTH,
Sebastian

 

[Xavier Noria]

Hi, I'm new to ruby, and am having trouble with the following (\n is
newline on a Mac).

Just in case... "\n" is a newline in any operating system.

 

[7stud --]

Just in case... "\n" is a newline in any operating system.

You don't know what you are talking about.

 

[Xavier Noria]

You don't know what you are talking about.

Huh?

 

[Ryan Davis]

Huh?

Ignore him. He's a dick.

 

[Jacky Cheung]

[Note: parts of this message were removed to make it a legal post.]

Ignore him. He's a dick.

you need to know some basic thing of programing


JackyCheung

 

[Xavier Noria]

El 22/07/2009, a las 13:57, Jacky Cheung <[email protected]> =20=

escribi=C3=B3:

you need to know some basic thing of programing

Don't know what you mean.

This article may give some light:

http://onlamp.com/pub/a/onlamp/2006/08/17/understanding-newlines.html

It's about Perl but the same principles hold in Ruby except there's no =20=

platform where "\n" =3D=3D "\015", and that the I/O layer is stdio =
instead =20
of PerIO (in MRI).

Sent from my iPhone=

 

[Jacky Cheung]

[Note: parts of this message were removed to make it a legal post.]

r u a programmer ? don't know '\n' is what mean???

 

[Kyle Smith]

r u a programmer ? don't know '\n' is what mean???

You're a programmer and you can't type well??? Please don't be rude.