syntax
in [Ruby]
|
Prev: SSL communication with Mechanize
Next: ri odd behavior
From: Raghu Maddali on 26 Jul 2010 01:06 > from outside the object, you must use a method. Hey Josh, My declaration will be something like Class Web Private $conf Private $database def __construct() @config = parse_ini_file('web/display.ini', true) @database = @config['Catalog']['database'] end end Will this be a correct Ruby syntax Thanks -- Posted via http://www.ruby-forum.com/.
From: Jesús Gabriel y Galán on 26 Jul 2010 02:37 On Mon, Jul 26, 2010 at 7:06 AM, Raghu Maddali <raghu1216(a)yahoo.co.in> wrote: >> from outside the object, you must use a method. > > Hey Josh, > > My declaration will be something like > > Class Web class Web > Private $conf > Private $database You don't need to declare the instance variables. And in any case Private is not a Ruby keyword. And $var is a global variable. Just remove all the $. > def __construct() If you want this to be your class' constructor, the method is called initialize, so def initialize > > @config = parse_ini_file('web/display.ini', true) > @database = @config['Catalog']['database'] > end > end This would be fine. > > Will this be a correct Ruby syntax Summary: class Web def initialize @config = parse_ini_file('web/display.ini', true) @database = @config['Catalog']['database'] end end Jesus.
From: Jarmo Pertman on 27 Jul 2010 13:12 And also, is you want to have access to @config and @database from the outside, then as already mentioned then all instance variables (the ones with @) are private. That means you have to use methods to set and get the values of those variables. So you could create a methods like this: class Web def config @config end def config=(new_config) @config = new_config end .... end But, since most of the time the get and set methods are defined just like the ones above then you can create those methods semi- automatically by an accessor methods. So, to define an get and set methods for @config and @database, you can do it like this: class Web attr_accessor :config, :database end Or if you want just a get methods use "attr_reader" instead. And for a write-only access "attr_writer". Enjoy Ruby! ----- Jarmo Pertman IT does really matter - http://www.itreallymatters.net On Jul 26, 9:37 am, Jesús Gabriel y Galán <jgabrielyga...(a)gmail.com> wrote: > On Mon, Jul 26, 2010 at 7:06 AM, Raghu Maddali <raghu1...(a)yahoo.co.in> wrote: > >> from outside the object, you must use a method. > > > Hey Josh, > > > My declaration will be something like > > > Class Web > > class Web > > > Private $conf > > Private $database > > You don't need to declare the instance variables. And in any case > Private is not a Ruby keyword. And $var is a global variable. Just > remove all the $. > > > def __construct() > > If you want this to be your class' constructor, the method is called > initialize, so > > def initialize > > > > > @config = parse_ini_file('web/display.ini', true) > > @database = @config['Catalog']['database'] > > end > > end > > This would be fine. > > > > > Will this be a correct Ruby syntax > > Summary: > > class Web > def initialize > @config = parse_ini_file('web/display.ini', true) > @database = @config['Catalog']['database'] > end > end > > Jesus.
From: Raghu Maddali on 27 Jul 2010 13:37 I've conf and database as class variables which I access in some other methods too...So can I write it as class Web @@config @@database def initialize @@config = parse_ini_file('web/display.ini', true) @@database = @@config['Catalog']['database'] end def methodA() @@database=...... end end Raghu -- Posted via http://www.ruby-forum.com/.
From: Jesús Gabriel y Galán on 28 Jul 2010 04:55
On Tue, Jul 27, 2010 at 7:37 PM, Raghu Maddali <raghu1216(a)yahoo.co.in> wrote: > I've conf and database as class variables which I access in some other > methods too...So can I write it as > > class Web > @@config > @@database You don't need to declare the variables. > def initialize > @@config = parse_ini_file('web/display.ini', true) > @@database = @@config['Catalog']['database'] > end > def methodA() > @@database=...... > end > end If they are class variables, it usually doesn't make a lot of sense to initialize them every time you create an instance of this class. Maybe the initialization of those variables should be put outside the initialize method, or if the values they might have could be different on each instance of the class, then leave them as instance variables. Jesus. |