"puts" without line feed

Ruby
1

Hi,
Is there a way to show output on a single line in the command prompt,
overwriting each time instead of linefeeding everytime I puts ‘my data’
?

I want the appearance of progress thru numerous iterations without
scrollin off into oblivion.

2

it’s “print”

print “line without line-feed”

or was it “prints” i don’t remember.

-Patrick

3

On Sun, Aug 10, 2008 at 2:36 PM, Bob M. [email protected] wrote:

Hi,
Is there a way to show output on a single line in the command prompt,
overwriting each time instead of linefeeding everytime I puts ‘my data’
?

I want the appearance of progress thru numerous iterations without
scrollin off into oblivion.

try print instead of puts

4

Heya!

On Sun, Aug 10, 2008 at 8:36 PM, Bob M. [email protected] wrote:

Hi,
Is there a way to show output on a single line in the command prompt,
overwriting each time instead of linefeeding everytime I puts ‘my data’
?

You can use print() instead of puts() which doesn’t add a linefeed.

5

Bob M. wrote:

Is there a way to show output on a single line in the command prompt,
overwriting each time instead of linefeeding everytime I puts ‘my data’
?

$stdout.sync = true
5.times do |i|
print “\r#{i}”
sleep 1
end

HTH,
Sebastian

6

Bob M. wrote:

then
does what I want at all, eh?
Thanks for kind & timely responses.

Try Sebastian’s example. It does what you want.

7

Le 10 août 2008 à 21:27, Bob M. a écrit :

so it rolls along “in place”

Try writing a “backspace” control caracter (ctrl-h, ascii code 8) ; for
example :

print “Countdown : 9”
9.downto(0) do |x|
print “\C-h#{x}”
sleep 1
end
puts

(I’m not entirely sure it’s completely cross-platform, but this simple
example works well with Windows and Unixoïds.)

Fred

8

On Mon Aug 11 04:27:56 2008, Bob M. wrote:

then
does what I want at all, eh?
Thanks for kind & timely responses.

You need to flush $stdout and move to the beginning of the line each
time:

jump = “\r\e[0K” # That is return to beginning of line and use the
# ANSI clear command “\e” or “\003”

(1…10).each do |i|
print jump + i
sleep 1
$stdout.flush
end

That should sort you.

9

uze guyz are SO close.

Print gives me

123456…to a new line…to another new line…

I’m tryin for

1

then

2 (where 1 was)

then

3 (where 1, then 2 were)

so it rolls along “in place”

Kinda silly, I know…I guess I should be happy the darn thing runs &
does what I want at all, eh?
Thanks for kind & timely responses.