From: Peter Vandenabeele <peter@...>
Date: 2011-09-29T19:07:40+09:00
Subject: Re: IO.readlines will not accept variable with file name Why?

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On Thu, Sep 29, 2011 at 11:56 AM, Robert Klemme
<shortcutter@googlemail.com>wrote:

> On Thu, Sep 29, 2011 at 11:14 AM, Joda jenson <jodajen2@yahoo.com> wrote:
> > I am fairly new to Ruby and I am stuck on this.  Would someone have a
> > suggestion.
> >
> > I'm trying to read a file with IO.readlines, letting a user give the
> > file name.
> > __________________________________________________
> > puts "what is the name of the file=>"
> > filename1 = gets
> >
> > filearray = IO.readlines(filename)
> > puts filearray [0]
> > __________________________________________________
> >
> > If I hard code the file name works great.
> >
> > filearray = IO.readlines("/home/user/file.txt")
> >
> > __________________________________________________
> > It seems to be something to do with the double quotes.
> > I have tried to wrap the variable with double quotes.
> >
> > filename1 = ("\"/home/user/file.txt\"")
> >
> > It will print the Double quote but still will not work if I pass it to
> > the IO.readlines()
> >
> > It gives a (Errno::ENOENT)
> >
> > It doesn't seem to matter how I doctor a string with quotes I can't get
> > IO.readlines() to accept it.  Only hard coding it works for some reason.
>
> Insert a line after "gets" like this:
>
> puts "what is the name of the file=>"
> filename1 = gets
> p filename1 # look at the output
>
> filearray = IO.readlines(filename)
> puts filearray [0]
>
> You'll immediately see what's wrong. :-)
>
>
I am not sure.

I think it is a simple typo in that

  filename1  (with a digit)

is asked by the get, but

  filename (without a digit)

is used in the call to IO.readlines.

IMHO, the code as shown above could never work with that typo ...

HTH,

Peter

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