From: Radek Hnilica <Radek@...>
Date: 2002-12-19T16:09:01+09:00
Subject: Few question about IO

	Hello,

I have few questions to wise mans.

First is about IO.  I want read from input stream words or longs in given endianity.  How can I extend IO class to have a method to read word or long word
from stream.  I try

class IO
    def getw
	getc()+256*getc()
    end
    public :getw
end

but calling:
    puts ARGF.getw()

gives me
./dis68k.rb:45: private method `getw' called for #<Object:0x401b1550> (NoMethodError)


Next question is about Regular expression.  I have a Hash filled with
keyword, label pairs.  Some of the keywords contains characters like:
+ & ( and other strange characters.  Then I have a string in which I
want replace all ocurrences of keywords with string <xref
linkend="#{label}"/> the keyword must be like a word separated from
other text by white spaces.  Now I use this method

def mangle(s, dict)
    dict.each_pair do |key,id|
        word = Regexp.quote(key)
        s.gsub!(%r[ #{word} ], %Q[ <xref linkend="#{id}"/> ])
        s.gsub!(%r[^#{word} ], %Q[<xref linkend="#{id}"/> ])
        s.gsub!(%r[ #{word}$], %Q[ <xref linkend="#{id}"/>])
    end
    s
end

Is there any better and speedy way how to do it.  I'm not great ruby hacker.
The
	s.gsub!(%r[\b#{word}\b], %Q[ <xref linkend="#{id}"/> ])

does not work because word can be + , : , ; , ... .  In my case word
is any sequence of printable characters separated from others with
white spaces.

The main goal is replace all ocurences of given words with <xref/> to
that word.  The table with words and its linkends is in file.  The
word is any sequence of printable characters separated from others by
whitespaces.

-- 
Radek Hnilica <Radek at Hnilica dot CZ>
=======================================
No matter how far down the wrong road you've gone, turn back.
						Turkish proverb