From: Brian Candler <b.candler@...>
Date: 2009-02-11T23:35:04+09:00
Subject: Re: Problem writing a Faster_csv generated record to a file

thiel wrote:
> This is the code:

Only part of it - you haven't shown what sort of object custrecord is, 
for example.

> op = File.new("C:/Test/testmap.csv", "w")
>     for i in 0 .. n
>       for j in 0 .. 12
>         custrecord[j] = x[i,j]
>       end

STDERR.puts "custrecord = #{custrecord.inspect}"

>       csv_string = FasterCSV.generate_line(custrecord)
>         csv_string.chop!
>         csv_string.gsub!(/,/, ';')
>         op.puts csv_string
>     end
> 
> The result in folder Test is: testmap.csv  -->  0Kb!!  (Type CSV file)

That STDERR line will tell you whether custrecord contains what you 
expect. If not, work backwards until you find the problem (e.g. look at 
what's in x)

There are simpler ways to drive fastercsv than your code though. Try 
this:

require 'rubygems'
require 'fastercsv'
FasterCSV.open("/tmp/test.csv", "w", :col_sep=>";") do |csv|
  custrecord = ["foo","bar","baz"]
  csv << custrecord
end

The documentation for fastercsv is within the code, which may be 
installed somewhere like .../gems/fastercsv-1.4.0/lib/faster_csv.rb on 
your system.

Or type "gem server --daemon" then point your web browser at 
http://localhost:8808/

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