Dir.mkdir appending question mark after directory name

Ruby
1

Hi all

I´m starting to laern Ruby, but i´ve encountered this strange problem.
This is my code:

pname = gets
pname.chomp
Dir.mkdir(pname)

If I enter test for pname, the resulting folder is named “test?”. What
am I doing wrong here?

Thanks

–
ruby --version gives this:
ruby 1.8.7 (2011-06-30 patchlevel 352) [x86_64-linux]

I´m running Ubuntu 12.04 on a MacBook

2

On Wed, Aug 29, 2012 at 10:51 AM, Joakim L. [email protected]
wrote:

Hi all

Im starting to laern Ruby, but ive encountered this strange problem.
This is my code:

pname = gets
pname.chomp

You are missing an exclamation mark:
pname.chomp!

The method without returns a new object but does not modify your
pname. You can see that by inserting

p pname

before creating the directory.

Dir.mkdir(pname)

If I enter test for pname, the resulting folder is named “test?”. What
am I doing wrong here?

See above.

Kind regards

robert

3

Thanks, Robert!

That helped :slight_smile:

I suppose pname.chomp! would mean the same as pname = pname.chomp then.
Didn´t think of that…

Robert K. wrote in post #1073741:

On Wed, Aug 29, 2012 at 10:51 AM, Joakim L. [email protected]
wrote:

Hi all

Im starting to laern Ruby, but ive encountered this strange problem.
This is my code:

pname = gets
pname.chomp

You are missing an exclamation mark:
pname.chomp!

The method without returns a new object but does not modify your
pname. You can see that by inserting

p pname

before creating the directory.

Dir.mkdir(pname)

If I enter test for pname, the resulting folder is named “test?”. What
am I doing wrong here?

See above.

Kind regards

robert

4

On Wed, Aug 29, 2012 at 11:33 AM, Joakim L. [email protected]
wrote:

Thanks, Robert!

YWC.

That helped :slight_smile:

Good!

I suppose pname.chomp! would mean the same as pname = pname.chomp then.

It has the same effects in your specific example. But effects will be
different if there is another reference the object referred to by
pname. In that case #chomp! and #chomp will behave differently
because with exclamation mark you’ll see the same object through both
references but without and assignment you won’t.

Kind regards

robert