From: "Brian Schröder" <ruby.brian@...>
Date: 2005-10-03T22:49:23+09:00
Subject: Re: ruby gsub! problem

On 03/10/05, Kev Jackson <kevin.jackson@it.fts-vn.com> wrote:
> > [snip]
>
> Here's what I ended up with - love blocks, without them there'd be a lot
> more resource handling...
>
> File.open("sections.sql", "w") do |output|
> File.open("TBLSECTION.dat","r") do |input|
>   lines=0
> # here I was trying to remove the \n
>   input.to_s.gsub!(/\n/, '')

Here your create a string from the input and substitute the newlines
against the empty string. You then forget about the string and it gets
garbage collected. Try

content = input.read
content.gsub!(/\n/, '')

and replace the below against

content.gsub!(/;/, ";\n")

and then write the content to a file

output << content

> # didn't work so moved into munge_fields
>   input.each(";") do |line|
>     munge_fields line
>     munge_data(line, lines+1)
>     p line
>     output << line << "\n"
>     lines+=1
>   end
>   p "Total Lines in file : " + lines.to_s
> end
> end
>
> both munge_fields and munge_data do the sub! thing to bring the data
> back to the format I want, and although I considered splitting to get an
> array of strings then creating a builder to rebuild my output, for now
> it works fine with simple regexps
>
> Kev
>

Or you do it in a more concise way:


File.open("sections.sql", "w") do |output|
  output << File.read("TBLSECTION.dat").gsub(/\n/, '').gsub(/;/, ";\n")
end

hope to help,

Brian

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