create file with LF (not CRLF) in windows

[Ben Anderson]

Hi,
I have a bunch of files that I want to convert from CRLF to just LF.=20
How might I do this? I'm testing with the following example file
(steel.rb):

f =3D File.new("steel", "w")
f.syswrite("steel\ncity");
f.close

I then run this from cygwin and get the following output

Ben Anderson@andersonbd1 /cygdrive/c/ruby
$ ruby steel.rb

Ben Anderson@andersonbd1 /cygdrive/c/ruby
$ cat -v steel
steel^M
city

How might I get rid of the CR and just have ruby use an LF?
Thanks,
Ben

 

[Bill Kelly]

I have a bunch of files that I want to convert from CRLF to just LF.
How might I do this? I'm testing with the following example file
(steel.rb):

f = File.new("steel", "w")
f.syswrite("steel\ncity");
f.close

Try in "binary" mode.

f = File.new("steel", "wb")

BTW, if you use blocks, you can omit the f.close:

File.new("steel", "wb") do |f|
f.print("steel\ncity")
end


(See also IO#binmode )


Regards,

Bill

 

[John W. Kennedy]

Hi,
I have a bunch of files that I want to convert from CRLF to just LF.
How might I do this? I'm testing with the following example file
(steel.rb):

f = File.new("steel", "w")
f.syswrite("steel\ncity");
f.close

I then run this from cygwin and get the following output

Ben Anderson@andersonbd1 /cygdrive/c/ruby
$ ruby steel.rb

Ben Anderson@andersonbd1 /cygdrive/c/ruby
$ cat -v steel
steel^M
city

How might I get rid of the CR and just have ruby use an LF?

Just as in many other languages, use "wb" instead of "w".

--
John W. Kennedy
"But now is a new thing which is very old--
that the rich make themselves richer and not poorer,
which is the true Gospel, for the poor's sake."
-- Charles Williams. "Judgement at Chelmsford"

 

[Ben Anderson]

yes - there it is. Thanks Bill.

Try in "binary" mode.

f =3D File.new("steel", "wb")

BTW, if you use blocks, you can omit the f.close:

File.new("steel", "wb") do |f|
f.print("steel\ncity")
end


(See also IO#binmode )


Regards,

Bill

 

[Jason Sweat]

yes - there it is. Thanks Bill.

Perhaps it makes a difference which binary you use, windows vs.
cygwin. I am usign the cygwin Ruby and it did not exhibit the
behavior you mentioned.

Regards,
Jason

 

[Malte Milatz]

Bill Kelly:

File.new("steel", "wb") do |f|
f.print("steel\ncity")
end

Warning: File::new() does not take block; use File:pen() instead.

Malte