Retrieving index of substrings contained within array

Question

I'm looping over some files, and need to skip files that have a certain substring in their path. These substrings are defined as an array. For example:

Dir.glob("#{temp_dir}/**/*").each do |file|
  # Skip files in the ignore list
  if (file.downcase.index("__macosx"))
    next
  end

  puts file
end

The code above successfully skips any file path with __macosx, but I need to adapt it to work with an array of substrings, something like the following:

if (file.downcase.index(["__macosx", ".ds_store"]))
    next
end

How can I do that, while avoiding having to write an extra loop to iterate over the substring array?

Anthony · Accepted Answer · 2015-11-03 12:47:50Z

2

You can use use Enumerable#any? to check like this:

ignore_files = %w(__macosx ds_store)
Dir.glob("#{temp_dir}/**/*").each do |file|
  # Skip files in the ignore list
  next if ignore_files.any? { |ignore_file| %r/ignore_file/i =~ file }

  puts file
end

edited Nov 3, 2015 at 12:47

answered Nov 3, 2015 at 11:51

Anthony

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3 Comments

John Dorean Over a year ago

Thanks, this really helped. Although I think I needed to convert ignore_file to a regular expression to use =~? The line that works in the end is: next if Init::IGNORE_PATHS.any? { |ignore_path| /#{ignore_path}/ =~ file.name.downcase }

Anthony Over a year ago

@JohnDorean - yes, good catch. I updated my answer to use the regex syntax w/ the i for case insensitive.

Stefan Over a year ago

You could also use a combined regular expression, e.g. Regexp.union(Init::IGNORE_PATHS)

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