Given:
lines = file.readlines("\x15") # don't ask 
lines.each do |y|
y.chomp!("\x15")
y.sub!(/^\n/,"") #kill off the extra line feeds
if y =~ /^\*\*\*/ then
y = "<someTag>" + y + "</someTag>"
...
[ assume ends]
puts lines
my output for the affected elements is:
<someTag>
value of y</someTag>
How can I get the results to be
<someTag>value of y</someTag>
I've tried changing y to y.to_s; I still get the new line.
I'm sure this is obvious if you know what you're doing, but I'm stumped.
Can somebody give me a clue?
TIA if you take a moment to point me in the right direction.
Gani
···
--
Posted via http://www.ruby-forum.com/.
Hi Gani,
try
y.gsub!(/^\n/,"") #kill off the extra line feeds
instead of
y.sub!(/^\n/,"") #kill off the extra line feeds
Ron
···
On 8/7/07, Gani Ruthellen <ganietse@gmail.com> wrote:
Given:
lines = file.readlines("\x15") # don't ask 
lines.each do |y|
y.chomp!("\x15")
y.sub!(/^\n/,"") #kill off the extra line feeds
if y =~ /^\*\*\*/ then
y = "<someTag>" + y + "</someTag>"
...
[ assume ends]
puts lines
my output for the affected elements is:
<someTag>
value of y</someTag>
How can I get the results to be
<someTag>value of y</someTag>
I've tried changing y to y.to_s; I still get the new line.
I'm sure this is obvious if you know what you're doing, but I'm stumped.
Can somebody give me a clue?
TIA if you take a moment to point me in the right direction.
Gani
--
Posted via http://www.ruby-forum.com/\.
Gani Ruthellen wrote:
Given:
lines = file.readlines("\x15") # don't ask
lines.each do |y|
y.chomp!("\x15")
y.sub!(/^\n/,"") #kill off the extra line feeds
I would think it better to just call y.chomp! here (with no argument).
if y =~ /^\*\*\*/ then
y = "<someTag>" + y + "</someTag>"
Know that this is actually rebinding the local variable y to point to a new object, not modifying the old object. If your goal was to modify the array "lines", you should change "lines.each" to "lines.map" and make sure you end the block with a statement that returns the modified y.
perhaps:
lines.map do |y|
y = y.chomp("\x15").chomp
y = "<someTag>" + y + "</someTag>" if y =~ /^\*\*\*/
y
end
Dan
Oops. That would not be any different because of the ^anchor.
y.sub!(/^\n+/,"") might do the trick.
Ron
···
On 8/7/07, ronald braswell <rpbraswell@gmail.com> wrote:
On 8/7/07, Gani Ruthellen <ganietse@gmail.com> wrote:
>
> Given:
> lines = file.readlines("\x15") # don't ask
> lines.each do |y|
> y.chomp!("\x15")
> y.sub!(/^\n/,"") #kill off the extra line feeds
> if y =~ /^\*\*\*/ then
> y = "<someTag>" + y + "</someTag>"
> ...
> [ assume ends]
> puts lines
>
> my output for the affected elements is:
> <someTag>
> value of y</someTag>
>
> How can I get the results to be
> <someTag>value of y</someTag>
>
> I've tried changing y to y.to_s; I still get the new line.
>
> I'm sure this is obvious if you know what you're doing, but I'm stumped.
>
> Can somebody give me a clue?
>
> TIA if you take a moment to point me in the right direction.
> Gani
> --
> Posted via http://www.ruby-forum.com/\.
Hi Gani,
try
y.gsub!(/^\n/,"") #kill off the extra line feeds
instead of
y.sub!(/^\n/,"") #kill off the extra line feeds
Ron
Know that this is actually rebinding the local variable y to point to a
new object, not modifying the old object. If your goal was to modify the
array "lines", you should change "lines.each" to "lines.map" and make
sure you end the block with a statement that returns the modified y.
perhaps:
lines.map do |y|
y = y.chomp("\x15").chomp
y = "<someTag>" + y + "</someTag>" if y =~ /^\*\*\*/
y
end
Dan
Sorry, actually doing each_with_index do |y,ind| (etc) and specifically
setting lines[ind] = y
but my original question remains: how do i make the "<tag>" + y leave
off the \n so the output is
<tag>text of y
Thanks again
···
--
Posted via http://www.ruby-forum.com/\.
Have you considered switching to map?
As for debugging, I'd try tracking it down using p
lines = file.readlines("\x15").map do |line|
line.chomp!("\x15")
line.sub!(/^\n/, "")
line = "<someTag>" + line + "</someTag>" if line =~ /^\*{3}/
p [:line, line] # comment me out after debugging
line
end
p [:lines, lines] # comment me out after debugging
puts lines
···
On Aug 7, 2:04 pm, Gani Ruthellen <ganie...@gmail.com> wrote:
> Know that this is actually rebinding the local variable y to point to a
> new object, not modifying the old object. If your goal was to modify the
> array "lines", you should change "lines.each" to "lines.map" and make
> sure you end the block with a statement that returns the modified y.
> perhaps:
> lines.map do |y|
> y = y.chomp("\x15").chomp
> y = "<someTag>" + y + "</someTag>" if y =~ /^\*\*\*/
> y
> end
> Dan
Sorry, actually doing each_with_index do |y,ind| (etc) and specifically
setting lines[ind] = y
but my original question remains: how do i make the "<tag>" + y leave
off the \n so the output is
<tag>text of y
Thanks again
--
Posted viahttp://www.ruby-forum.com/.
Gani Ruthellen wrote:
Know that this is actually rebinding the local variable y to point to a
new object, not modifying the old object. If your goal was to modify the
array "lines", you should change "lines.each" to "lines.map" and make
sure you end the block with a statement that returns the modified y.
perhaps:
lines.map do |y|
y = y.chomp("\x15").chomp
y = "<someTag>" + y + "</someTag>" if y =~ /^\*\*\*/
y
end
Dan
Sorry, actually doing each_with_index do |y,ind| (etc) and specifically setting lines[ind] = y
but my original question remains: how do i make the "<tag>" + y leave off the \n so the output is
<tag>text of y
Thanks again
Sorry, I thought that would work but didn't test it. "y.lstrip" will do what you want, but will also will strip leading whitespace, which might not be okay. If not, "y[1..-1]" should suffice--this will return y from the second character on.
y = y[1..-1] if y =~ /^\n/
Dan
Noah Easterly wrote:
> end
Posted viahttp://www.ruby-forum.com/.
Have you considered switching to map?
As for debugging, I'd try tracking it down using p
lines = file.readlines("\x15").map do |line|
line.chomp!("\x15")
line.sub!(/^\n/, "")
line = "<someTag>" + line + "</someTag>" if line =~ /^\*{3}/
p [:line, line] # comment me out after debugging
line
end
p [:lines, lines] # comment me out after debugging
puts lines
Oh. I did a subset of the p [:line, line] and it looks like i had some
\n and some \r\n occurring. I was just pulling the \r\n on my sub call
(wrote it as \n to simplify)because when I was looking at the original
with end of line showing they all showed as CRLF. Odd.
Much improved output, and another tool in my meager toolkit. Thanks so
much, Noah and all other repliers! I'll look at replacing the each with
map/collect now that I know about it. I do have the Pragmatic
programming book...
Cheers, Gani
···
On Aug 7, 2:04 pm, Gani Ruthellen <ganie...@gmail.com> wrote:
--
Posted via http://www.ruby-forum.com/\.
Piece of advice - concatenation in Ruby is very fast but you should
take the better way by using:
y = "<someTag>" << y << "</someTag>"
which is a little faster with same readability 
···
On Aug 7, 9:10 pm, Gani Ruthellen <ganie...@gmail.com> wrote:
Noah Easterly wrote:
> On Aug 7, 2:04 pm, Gani Ruthellen <ganie...@gmail.com> wrote:
>> > end
>> Posted viahttp://www.ruby-forum.com/.
> Have you considered switching to map?
> As for debugging, I'd try tracking it down using p
> lines = file.readlines("\x15").map do |line|
> line.chomp!("\x15")
> line.sub!(/^\n/, "")
> line = "<someTag>" + line + "</someTag>" if line =~ /^\*{3}/
> p [:line, line] # comment me out after debugging
> line
> end
> p [:lines, lines] # comment me out after debugging
> puts lines
Oh. I did a subset of the p [:line, line] and it looks like i had some
\n and some \r\n occurring. I was just pulling the \r\n on my sub call
(wrote it as \n to simplify)because when I was looking at the original
with end of line showing they all showed as CRLF. Odd.
Much improved output, and another tool in my meager toolkit. Thanks so
much, Noah and all other repliers! I'll look at replacing the each with
map/collect now that I know about it. I do have the Pragmatic
programming book...
Cheers, Gani
--
Posted viahttp://www.ruby-forum.com/.