Nubie question


#1

I am trying to learn Ruby and I have read the picax book at least twice
and
seems to understand most of what is said in the book. Now I am reading
through some of the code written that I down loaded. I saw some code
that I
wanted someone to explain to me.

module HL7 # :nodoc:
VERSION = “0.1.%s” % “$Rev: 23 $”.gsub(/$Rev:\s+/, ‘’).gsub(/\s*$$/,
‘’)
end

Encapsulate HL7 specific exceptions

class HL7::Exception < StandardError
end

Parsing failed

class HL7::ParseError < HL7::Exception
end

Explain to me how to use the “::” operator. It seems the author is
defining
a Class called HL7::Exception? The syntax for class definition is Class
Name.

Thanksl


#2

Hi,

Am Montag, 30. Jul 2007, 07:04:57 +0900 schrieb Mac Pat:

module HL7 # :nodoc:
VERSION = “0.1.%s” % “$Rev: 23 $”.gsub(/$Rev:\s+/, ‘’).gsub(/\s*$$/, ‘’)
end

I think smarter would be one of

V = “0.1.” + “$Rev: 23 $”[/$Rev:\s*(\d+)\s*$/, 1]
V = “0.1.%d” % “$Rev: 23 $”[/\d+/]
V = [0,1,"$Rev: 23 $"[/\d+/]].join “.”

To get it readable to some slight extent one should split it
up into at least two lines.

tiny = “$Rev: 23 $”[/\d+/]

Encapsulate HL7 specific exceptions

class HL7::Exception < StandardError
end

module HL7 ; class Exception < ::StandardError ; end ; end

Bertram


#3

explain to me.

Parsing failed

Thanksl

Check out the Pickaxe chapter on modules.

HTH,

Felix