Scripting 101

* hemanth has changed the topic to: PERL and RUBY OOP

<hemanth> So far we saw an overview of py OOP

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<hemanth> Even though OOP is very vast

<hemanth> we can get started easily

<hemanth> by knowing the skeleton

<hemanth> so with reference to yest, i will just give you an intro to how the same works in pl and rb

<hemanth> So first up is class declaration

<hemanth> class ClassName

<hemanth> end

<hemanth> in rb ^

<hemanth> class ClassName {

<hemanth> }

<hemanth> or class ClassName;

<hemanth> in pl^

<hemanth> pl6 is what i suggest for OOP

<hemanth> 2)0bject creation

<hemanth> new class_name(...) in pl

<hemanth> class_name.new(...) in rb

<hemanth> 3) Method invocation

<hemanth> object.method

<hemanth> object.method(param)

<hemanth> 4) Testing class membership

<hemanth> is_a? kind_of? in rb

<hemanth> isa in pl

<hemanth> 5) Inheritance

<hemanth> class child < parent end in rb

<hemanth> class child is parent { ... } in pl

<hemanth> seems fine and kool so far :) ?

<SourRust> yup

<Laks> yes

<hemanth> So, if one is not willing to do OOP with pl6

<hemanth> use package Color; instead of class ClassName;

<hemanth> and method invoking must be done with "->" that is like object->method

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<adamcollado> hellooo

<hemanth> If you all rembr, when dealing with variables in rb, i had mentioned about instance variables

<hemanth> adamcollado, Halloween :)

<adamcollado> sorry for lateness =/

<adamcollado> yes

<adamcollado> fun time in new york :)

<Laks> we are one hour behind from today

* hemanth sends logs so far to adamcollado

<hemanth> Halloween from CS grades http://i.imgur.com/AGj4n.jpg

<hemanth> :)

<hemanth> @var_name is rb is an instance variable

<adamcollado> lol

<hemanth> :)

<adamcollado> thanks hemanth for the log

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<hemanth> adamcollado, np :) trying to keep it as crisp as possible, as i learnt that this class likes crispness and all are smart enuf to get the fruit, if shown the root ;)

<adamcollado> yep :)

<hemanth> Similarly Class variables are accessed using the @@ operator

<hemanth> @_@

<adamcollado> lol

<hemanth> private :method_name in the class makes that method private

<hemanth> that is those methods can be accessed by the instances alone and is not passed to the child

<hemanth> Public is default accessibility level for class methods.

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<hemanth> again in pl, we have @ISA = qw( Parent ); for inheritance and class child is parent { ... } in pl6

<hemanth> Simple example of class in rb:

<hemanth> class String

<hemanth> def NullOrEmpty?

<hemanth> (self == nil || self == "")

<hemanth> end

<hemanth> puts "test".NullOrEmpty?

<hemanth> puts "".NullOrEmpty?

<hemanth> o/ ??

<SourRust> nope

<hemanth> in pl :

<hemanth> class Shape {

<hemanth> has $.x is rw;

<hemanth> has $.y is rw;

<hemanth> method moveTo($newx, $newy) {

<hemanth> $.x = $newx;

<hemanth> $.y = $newy;

<hemanth> }

<hemanth> pl6 ^

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<hemanth> package MyClass;

<hemanth> sub new

<hemanth> {

<hemanth> print " MyClass::new called\n";

<hemanth> my $type = shift; # The package/type name

<hemanth> my $self = {}; # Reference to empty hash

<hemanth> return bless $self, $type;

<hemanth> }

<hemanth> sub DESTROY

<hemanth> {

<hemanth> print " MyClass::DESTROY called\n";

<hemanth> }

<hemanth> new is the constructor and DESTROY is destructor

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<hemanth> that is those sub's are called when the object is cerated and destroyed

<hemanth> o/ ?

<laks> No

<SourRust> is $. like a this or self

<hemanth> yes :)

* PaBLoX (ba688ccc@gateway/web/freenode/ip.186.104.140.204) has joined #p2pu-webcraft/scripting-101

<SourRust> kk

<PaBLoX> Hi!

<PaBLoX> Sorry again ¬¬

<hemanth> PaBLoX, its ok

* hemanth sends logs to PaBLoX ¬¬

<hemanth> So in sub's of pl we can use the key word 'my' and the var-name to make them behave as instance vars

<hemanth> So this just gives a glimpse of pl and rb OOP, after yestd OOP and PY OOP intro

<hemanth> So, there is no hurry, learn programming in a life time :) not in 14 days ;)

<hemanth> this class so far hopefully has given an overview of BASH,py,pl and rb

<hemanth> it's just half step of the first step of coding

<hemanth> All's fine so far..:)?

<hemanth> as been the most repeated line in this class

<SourRust> yup

<PaBLoX> Yup

<laks> yes

<PaBLoX> I'm sorry I still can catch up with the files D:

<hemanth> as a whole, i have learnt many things from all of you

<PaBLoX> *

<PaBLoX> *can't

<hemanth> learning and let learning is the Mantra

<hemanth> its not the end, but the start

<hemanth> PaBLoX, no issue, you have loads of time from now on

<hemanth> SourRust, get the on time award

<SourRust> xD

* hemanth sends chocolates to SourRust

<hemanth> i really need to appreciate the way he has maintained the time

<laks> :)

<hemanth> Adams and Jimmy have been very active on git project p2pu

<hemanth> ++ to there karma

<hemanth> all other potential candidates who will be reading this log, do have time to get more awards

<hemanth> all in all it has been a rocking experience with you guys

<hemanth> will indeed miss you all and feel empty from next week

<hemanth> but, very true we all are connected

<PaBLoX> <3!

<hemanth> You can write me recommendations on http://in.linkedin.com/in/hemanthhm ;)

<hemanth> code together with me in http://github.com/hemanth

<hemanth> follow me on http://twitter.com/hemanth_hm

<hemanth> or even add me on http://facebook.com/hemanth

<hemanth> last but not the least can comment on my posts http://h3manth.com

<adamcollado> sadness

<hemanth> Me feel delighted to come so far and whole heartedly thanks the Mozilla P2PU group :)

<hemanth> which we all are part of

<hemanth> we must be happy that we are a part of a great revolution

<PaBLoX> hemanth: following you on twitter

<hemanth> PaBLoX, :)

<hemanth> we are reshaping and redefining education

<hemanth> i will be sending you all a simple feedback form, for the betterment of the future courses i would be running in P2PU, so please give your valuable time in filling them :)

<adamcollado> sure thing!!

<hemanth> So, now its your turn to say few words here :)

* hemanth rembrs the first day, where each of them introduced themselves :)

* hemanth is still as excited as the first class :D

<adamcollado> It was kinda tough at first juggling 4 langauges at the same time, but I got use to it. I also learned how to use git pretty well! :D

<hemanth> adamcollado, nice :)

<hemanth> hemanth, is following PaBLoX on twitter

<PaBLoX> hemanth: cool =)

<adamcollado> hemanth, i just started following you on twitter as well :)

<PaBLoX> Well, actually I still find hard to work with 4 languages at the same time

<PaBLoX> adamcollado: which is your twitter?

<adamcollado> datruth29

<PaBLoX> I'm going to create a list :)

<hemanth> SourRust, laks you guys there?

<hemanth> PaBLoX, was thinking the same :)!

<PaBLoX> p2pu-scripting101

<PaBLoX> ?

<SourRust> yea

<hemanth> okies

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<PaBLoX> http://twitter.com/#!/PaBLoX/p2pu-scripting101

<PaBLoX> I'm gonna add there everyone that participated here

<PaBLoX> =)

<PaBLoX> BTW, I'll wait for a scripting 200

<PaBLoX> =P

<hemanth> ha ha :D

<adamcollado> yes :D

<hemanth> So those who want to get involved in pygtk

<hemanth> can go through the blames of http://github.com/hemanth/futhark/blame/master/gtk-window.py

<hemanth> i had take a long time to make that file, so it would be easy to get started

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<hemanth> hemanth, sends a follow request to adamcollado :)

<adamcollado> cool :D

<PaBLoX> adamcollado: same here

<laks> It was a really good learning experience. Logging on every weekend

<hemanth> i lately made a python irc bot, see the video here http://vimeo.com/16360222

<hemanth> laks, ok :)

<adamcollado> I enjoyed the looking at each other's code aspect in the github, especially the limpid code base :)

<hemanth> adamcollado,:)

<hemanth> limpid was a dream come true for me

<hemanth> hoping to make it better with all ur helping hands

<hemanth> hack more on p2pu => http://github.com/p2pu

<hemanth> So if no more o/ i will end this class here

<hemanth> :)

<adamcollado> okay :)

<hemanth> do keep in touch

<hemanth> init0 for now :)

<adamcollado> lawl

<laks> thanks for teaching us:)

<adamcollado> yes, thanks hemanth!

<hemanth> thank you all :)

<adamcollado> Later!

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<SourRust> cya guys

Course Material

Chat log Class 14