From: Phillip Gawlowski <cmdjackryan@...>
Date: 2008-04-09T15:28:32+09:00
Subject: Re: output of a method to file?

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Zoe Phoenix wrote:

| directory\rubyprograms\cities.rb:33:in 'initialize':
| ubyfiles    tylist-city1.txt (Errno::EINVAL)
|    from directory\rubyprograms\cities.rb:33:in
| 'open'
|    from directory\rubyprograms\cities.rb:33
|
| ********
|
|
| There's something wrong with the code, I know, but I'm not sure what.

Yes, but something simple, actually, and easy to fix:

Ruby, like other programming languages, uses the backslash "\" as an
escape character. That means (in simple terms), Ruby ignores the
character directly after the backslash. Usually, because that character
means something special. An example is the newline character "\n", which
produces a newline in a file or screen output, for example. (Like
pressing enter, just done by Ruby).

printf "This text has\na new line" #demonstrates the \n character.

You have two options: You can change your back slashes to forward
slashes (from \ to /), or add another backslash to escape your backslashes:

This happens when you try to open the file to write into it.

The possible solutions:
File::open("c:\\rubyfiles\\citylist-#{save_as}.txt", 'w') #Escaping the
backslashes
File::open("c:/rubyfiles/citylist-#{save_as}.txt", 'w') #Using forward
slashes

Both solutions are fine. Windows can handle forward slashes, too (at
least in Windows XP).

I hope that helps. :)

- --
Phillip Gawlowski
Twitter: twitter.com/cynicalryan

~ - You know you've been hacking too long when...
...after days with YACC, you start to parse your conversations.
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