What is wrong with my code

Hi folks,

I write two srcipts to check files in a given directory. Version 1 uses
regular expression and works but I cann’t find the size for each file.
Version 2 uses Ruby built-in File.file? method but it doesn’t work at
all. I wonder what is going on with my scripts?

Thank you,

Li

#######Version 1:

path=‘c:\path\to\folder’
Dir.open(path).each do |file|
if file=~/(\w+|d+).(\d{3,})/
puts file
puts File.size(file)# this line doesn’t work
file_number+=1
end
end

puts
puts ‘Files’,path
puts ‘File number’,file_number

#######Version2
path=‘c:\path\to\folder’
Dir.open(path).each do |file|
if File.file?(file)
puts file
puts File.size(file)
file_number+=1
end
end

puts
puts ‘Files’,path
puts ‘File number’,file_number

On 10/21/06, Li Chen [email protected] wrote:

Li
end
puts File.size(file)
file_number+=1
end
end

puts
puts ‘Files’,path
puts ‘File number’,file_number


Posted via http://www.ruby-forum.com/.

file in those cases should just be the file name, without the path info.
So
unless the directory you’ve opened is your current directory,
File.sizewon’t work right. Try
File.size(File.join(path, file)) (same goes for File.file?)

-Scott

Dir.each returns the file, without the path information. You’ll need to
prepend that and using File.join is a good way to do it.

         file_number+=1
   end

end

puts
puts ‘Files’,path
puts ‘File number’,file_number


Posted via http://www.ruby-forum.com/.

Use File.extend_path to convert path to absolute path.I think there is
something wrong with the file.

Li Chen wrote:

Hi folks,

I write two srcipts to check files in a given directory. Version 1 uses
regular expression and works but I cann’t find the size for each file.
Version 2 uses Ruby built-in File.file? method but it doesn’t work at
all. I wonder what is going on with my scripts?

So you want to sum sizes of all files in a directory hierarchy whose
names match a certain pattern. The pattern you use cannot be used with
Dir[] for filtering. So you better use find:

sum = 0
Find.find(path) do |f|
sum += File.size(f) if
/(\w+|d+).(\d{3,})/ =~ File.basename(f) && File.file?(f)
end

Note, your regexp might not match what you actually think it matches.
At the moment you match all file names that contain (!) at least a
single digit or word character followed by any character and then at
least three digits. I am guessing here but do you maybe rather want all
files that have a purely numeric file extension? In that case this
regexp would be better

/.\d+$/

Regards

robert

Li Chen wrote:

/ …

Thank you very much for the code. Based on what I understand and what I
need I make some changes. But I still have some questions:1) How do I
factor the print or format codes here?

Tell me what output you want to see and I will tell you how to get it.

  1. The outputs of the file are
    in reverse order how do I print them out in this format; xxx.001,
    xxx.002,…,xxx.026

Push the items into an array, sort the array, print the sorted array.

  1. what is the purpose of File.basename here?

File.basename gives either a filename without its preceding path, or a
filename without either its preceding path or its suffix, depending on
which options are exercised.

Because of the nature of your questions, I want to make you aware of a
way
to get some answers on your own:

http://www.ruby-doc.org/

… and …

http://www.ruby-doc.org/docs/ProgrammingRuby/

The second of these, which can also be downloaded, is a treasure trove
of
information. It contains answers to a large percentage of your
questions.

Li Chen wrote:

Hi folks,

I write two srcipts to check files in a given directory. Version 1 uses
regular expression and works but I cann’t find the size for each file.
Version 2 uses Ruby built-in File.file? method but it doesn’t work at
all.

Explain. What error messages did you see? You need to provide more
information.

I wonder what is going on with my scripts?

Thank you,

Li

#######Version 1:

path=‘c:\path\to\folder’

Don’t use backslashes like this. Use forward slashes to avoid problems
in
interpretation. Ruby will know what to do.

Dir.open(path).each do |file|
if file=~/(\w+|d+).(\d{3,})/
puts file
puts File.size(file)# this line doesn’t work

“Doesn’t work”? Please tell us what error message you saw. Maybe the
“file”
was a directory?

Hi Paul,

Thank you very much. I have a Pickaxe but it is at home.

Li

Robert K. wrote:

So you want to sum sizes of all files in a directory hierarchy whose
names match a certain pattern. The pattern you use cannot be used with
Dir[] for filtering. So you better use find:

sum = 0
Find.find(path) do |f|
sum += File.size(f) if
/(\w+|d+).(\d{3,})/ =~ File.basename(f) && File.file?(f)
end

Hi Robert,

Thank you very much for the code. Based on what I understand and what I
need I make some changes. But I still have some questions:1) How do I
factor the print or format codes here? 2) The outputs of the file are
in reverse order how do I print them out in this format; xxx.001,
xxx.002,…,xxx.026 3) what is the purpose of File.basename here?

Thanks,

Li

#dir6.rb find the file number in a folder
require ‘find’

path=‘I:/Common/Gao/Notebooks/Flow/OT1/OTI-4’

file_number = 0
Find.find(path) do |f|
#sum += File.size(f) if

/(\w+|d+).(\d{3,})/ =~ File.basename(f) && File.file?(f)

#puts f if /(\w+|d+).(\d{3,})/ =~ File.basename(f) && File.file?(f)
if File.file?(f) && f=~/(\w+|d+).(\d{3,})/
print f,"\t"
printf("%10s %10s", File.size(f),‘byte’ )
puts
file_number+=1
end
end

puts file_number

###screen output

I:/Common/Gao/Notebooks/Flow/OT1/OT1-typing-3/OT1-3.028 4796348
byte

I:/Common/Gao/Notebooks/Flow/OT1/OT1-typing-3/OT1-3.001 11877548
byte
28

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