Grade my test?


#1

I have directory of data files along with a few other types of files.
The
data file names start at 0000 and run to 3999. I have a program that
creates an array for the data files without the non data files. This
program works good but have I created the shortest way of doing the
task?
Thanks for grading my test. Jeff

#Puts the contents of the current directory into data_files.
dir_file_list = Dir.entries(".")
data_files = []

dir_file_list.each do|files|
if files.to_i > 0 && files.to_i < 4000
data_files.push files
end
end

puts data_files


#2

On 6/16/07, jabowen removed_email_address@domain.invalid wrote:

dir_file_list.each do|files|
if files.to_i > 0 && files.to_i < 4000
data_files.push files
end
end

puts data_files

That would work just fine. Here’s another one:

data_files = Dir.entries.select { |file| (1…4000).include? file.to_i }

Be aware of how #to_i works, though. This will grab a file named
“24-7Project”, for example.

Todd


#3

On 6/16/07, jabowen removed_email_address@domain.invalid wrote:

I have directory of data files along with a few other types of files. The
data file names start at 0000 and run to 3999. I have a program that
creates an array for the data files without the non data files. This
program works good but have I created the shortest way of doing the task?
Thanks for grading my test. Jeff

#Puts the contents of the current directory into data_files.
dir_file_list = Dir.entries(".")
data_files = []

dir_file_list.each do|files|
if files.to_i > 0 && files.to_i < 4000
data_files.push files
end
end

puts data_files

Does it really work? What about file "0000’ ?
The problem is that “a”.to_i --> 0
I would go for

Dir["[0-9]"*4]

or
Dir["[0-3]" + “[0-9]”*3]
if necessary.

HTH
Robert