Redirect STDOUT

Ruby
1

Hi all

I’m writting a program to detect the cursor position with the vt100
command “\x1b[6n”.

So I need to redirect STDOUT to a string.

How can I do this?

Thanks

2

yong wrote:

Hi all

I’m writting a program to detect the cursor position with the vt100
command “\x1b[6n”.

So I need to redirect STDOUT to a string.

How can I do this?

Thanks

I suggest looking at the code for the win2console library, which gives
an example of something similar.

3

David R. wrote:

yong wrote:

Hi all

I’m writting a program to detect the cursor position with the vt100
command “\x1b[6n”.

So I need to redirect STDOUT to a string.

How can I do this?

Thanks

I suggest looking at the code for the win2console library, which gives
an example of something similar.

Oh bother! That should be “win32console”.

DJ

4

Thank you very much.

Now I can use STDOUT.reopen to redirect STDOUT output to a file.But How
can I redirect it to a string?

Thanks.

David R. [email protected] writes:

Thanks

I suggest looking at the code for the win2console library, which gives
an example of something similar.

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5

On Sun, 15 Oct 2006, yong wrote:

Thank you very much.

Now I can use STDOUT.reopen to redirect STDOUT output to a file.But How can I redirect it to a string?

Thanks.

use backticks:

string = your_cmd.exe

substitution works like double quotes

cmd = “your_cmd.exe”
string = #{ cmd }

-a

6

On Oct 14, 2006, at 8:50 PM, yong wrote:

gives
an example of something similar.

Now I can use STDOUT.reopen to redirect STDOUT output to a file.But
How can I redirect it to a string?

You don’t.

You should avoid touching STDOUT and STDERR as much as possible.

Instead assign a StringIO to $stdout.

http://blog.segment7.net/articles/2006/08/17/stdout-vs-stdout

–
Eric H. - [email protected] - http://blog.segment7.net
This implementation is HODEL-HASH-9600 compliant

http://trackmap.robotcoop.com

7

yong wrote:

Now I can use STDOUT.reopen to redirect STDOUT output to a file.But How
can I redirect it to a string?

see “ri StringIO”

DJ

8

#!/usr/bin/ruby

require ‘stringio’

mystring=“”
sstring=StringIO.open(mystring,“w+”)

#STDOUT.reopen(sstring) #can’t work
stdoutbackup=$stdout
$stdout=sstring

print “BUFFERED TEXT\r\n”

$stdout=stdoutbackup
print mystring
<<<

It works.

Thank you very much. :slight_smile:

Eric H. [email protected] writes:

I suggest looking at the code for the win2console library, which
Instead assign a StringIO to $stdout.

–
My Personal Website:

http://www.twinbee.info

�人驻��

cn.comp.lang.perl
cn.comp.lang.c
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cn.music
cn.music.classical

9

On Oct 15, 2006, at 3:30 AM, yong wrote:

http://blog.segment7.net/articles/2006/08/17/stdout-vs-stdout

require ‘stringio’

mystring=“”
sstring=StringIO.open(mystring,“w+”)

sstring = StringIO.new will suffice.

#STDOUT.reopen(sstring) #can’t work
stdoutbackup=$stdout
$stdout=sstring

print “BUFFERED TEXT\r\n”

$stdout=stdoutbackup

I tend to wrap this up in a method that yields. See util_capture in
ZenTest’s test/zentest_assertions.rb

–
Eric H. - [email protected] - http://blog.segment7.net
This implementation is HODEL-HASH-9600 compliant

http://trackmap.robotcoop.com