File system crawler - iteration bugs

问题

I'm currently building a file system crawler with the following code:

require 'find'
require 'spreadsheet'
Spreadsheet.client_encoding = 'UTF-8'

count = 0

Find.find('/Users/Anconia/crawler/') do |file|           
  if file =~ /\b.xls$/                                            # check if filename ends in desired format
    contents =  Spreadsheet.open(file).worksheets
    contents.each do |row|
      if row =~ /regex/
        puts file
        count += 1
      end
    end
  end
end

puts "#{count} files were found"

And am receiving the following output: 0 files were found

The regex is tested and correct - I currently use it in another crawler that works.

The output of row.inspect is

#<Spreadsheet::Excel::Worksheet:0x003ffa5d418538 @row_addresses= @default_format= @selected= @dimensions= @name=Sheet1 @workbook=#<Spreadsheet::Excel::Workbook:0x007ff4bb147140> @rows=[] @columns=[] @links={} @merged_cells=[] @protected=false @password_hash=0 @changes={} @offsets={} @reader=#<Spreadsheet::Excel::Reader:0x007ff4bb1f3b98> @ole=#<Ole::Storage::RangesIOMigrateable:0x007ff4bb126fa8> @offset=15341 @guts={} @rows[3]> - certainly nothing to iterate over.

回答1:

Try this:

content = Spreadsheet.open(file)
sheet = content.worksheet 0 
sheet.each do |row|
...

回答2:

As Diego mentioned, I should have been iterating over contents - really appreciate the clarification! It should also be noted that row must be converted to a string before any iteration takes place.

来源：https://stackoverflow.com/questions/14044357/file-system-crawler-iteration-bugs