From: Shannon Fang <xrfang@...>
Date: 2002-12-12T09:08:58+09:00
Subject: Re: help -- persuade my boss to adopt ruby

Hi Leif,

Thanks for the code. While reading your code, I remembered one thing I'm
not happy with Java. Although it is much better than C++, I think Java
is still quite low level language, it is artificially made complex by a
huge tree of classes. When I learned Java, and checked the document I
don't know which class will suit my need, for example, the PrintWriter
class, I'm sure there are similar parent/child/sibling of it that does
similar job...

Ruby's class hierachy is simpler and it is easier to find suitable
class/method for your purpose. What do you feel?

Shannon

On Thu, 12 Dec 2002 09:02:30 +0900
Leif Jantzen <leif.jantzen@cyberdude.com> wrote:

> Shannon Fang wrote:
> 
> > Hi Ruby Lovers,
> > 
> > File.open("output.txt","w+") do |f|
> >     File.open("input.txt").each_line do |line|
> >         fld=line.match(/.{4}(.{3})(.{6})(.{3}).{17}(.{6})/)
> >         f.print fld[0],"-",fld[1],"-",fld[2],fld[3]
> >     end
> > end
> > 
> 
> You might try something like the following.  It has been tested on a sample 
> file of my own design...  There may be better/more compact/idiomatic ways 
> to do this... 
> 
> Although this example is slightly more complex than the ruby example, this 
> should not be the only reason to choose ruby over java.  Think carefully
> before you choose. 
> 
> # File:  ProcessFile.java 
> 
> import java.io.* ;
> import java.util.regex.* ;
> 
> class ProcessFile {
>   public static void main(String[] argv){
> 
>     try {
>       File f_in  = new File("input.txt");
>       File f_out  = new File("output.txt");
>       String line ;
>       Pattern p = Pattern.compile("(.{4}(.{3})(.{6})(.{3}).{17}(.{6}))") ;
> 
>       LineNumberReader in = new LineNumberReader(new FileReader(f_in));
>       PrintWriter out = new PrintWriter(new FileWriter(f_out));
> 
>       while ( null != ( line=in.readLine())) {
>         Matcher m = p.matcher(line);
>         if ( true == m.find()) {
>           System.out.println(m.group(1) + "-" + m.group(2) + "-" + 
> m.group(3)+ m.group(4));
>         }
>       }
>     } catch ( Exception e ) {
>       e.printStackTrace();
>     }
>   }
> }