Extract the filepath from this ruby string

Question

I am using the ruby Dir method to get all the filenames within a directory. Like this:

 dir_files = Dir["/Users/AM/Desktop/07/week1/dailies/regionals/*.csv"]

This gives me an array with each element listed below:

 /Users/AM/Desktop/07/week1/dailies/regionals/ch002.csv
 /Users/AM/Desktop/07/week1/dailies/regionals/ch014.csv
 /Users/AM/Desktop/07/week1/dailies/regionals/ch90.csv
 /Users/AM/Desktop/07/week1/dailies/regionals/ch112.csv
 /Users/AM/Desktop/07/week1/dailies/regionals/ch234.csv

Im trying to extract just the part of the above strings that matches: "regionals/*.csv"

How do I do that in Ruby?

The following didn't work

@files_array.each do |f|
     f = f.split("/").match(/*.csv/)
    i = f.include?(".csv")
    puts "#{i.inspect}"

    #self.process_file(f[i])
 end

Whats a clever way of doing this? I intend to pass the returned string of each filename to a helper method for processing. But as you can see all the csv files are located in a different directory as my executing script. My script thats executing this is located at

 /Users/AM/Desktop/07/week1/dailies/myScript.rb

Thanks

apiology · Accepted Answer · 2013-07-27 15:11:41Z

3

This will always post back the final directory and file name, regardless of the file pattern:

@files_array.map { |f| f.split("/")[-2..-1].join("/") }
#=> ["regionals/ch002.csv", "regionals/ch014.csv", "regionals/ch90.csv", "regionals/ch112.csv", "regionals/ch234.csv"]

answered Jul 27, 2013 at 15:11

apiology

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1 Comment

banditKing Over a year ago

This solution is great because the word "regional" is not hard coded into the method. The directory name could be anything as long as the relative path of the script t the files doesnt change. Thanks

tessi · Accepted Answer · 2013-07-27 15:03:38Z

1

This gives you the desired values :)

dir_files.map {|path| path[/regionals\/.*.csv/]}
#=> ["regionals/ch002.csv", "regionals/ch014.csv", "regionals/ch90.csv", "regionals/ch112.csv", "regionals/ch234.csv"]

answered Jul 27, 2013 at 15:03

tessi

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3 Comments

Arup Rakshit Over a year ago

what is the output OP is looking for,I didn't get that. Could you help me out on that ? :(

tessi Over a year ago

Just added the output I think he is looking for ;)

Arup Rakshit Over a year ago

Yeah! I just seen.. :)

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