Re: Now I Know Why I'm Having Trouble With Objects

  • From: "Jacob Kruger" <jacobk@xxxxxxxxxxxxxx>
  • To: <programmingblind@xxxxxxxxxxxxx>
  • Date: Tue, 12 Apr 2011 23:47:27 +0200

Except that the ball is not the object making the action, so it would be more 
like:
self.kick(ball)

<smile> - think that relates to procedural approach or something - simple 
version is means to an end...

Stay well

Jacob Kruger
Blind Biker
Skype: BlindZA
'...fate had broken his body, but not his spirit...'

  ----- Original Message ----- 
  From: Homme, James 
  To: programmingblind@xxxxxxxxxxxxx 
  Sent: Tuesday, April 12, 2011 9:19 PM
  Subject: Now I Know Why I'm Having Trouble With Objects


  Hi,

  I found this humorous.

   

  Understanding the Parts of VBA "Speech"

   

  If you were going to play soccer using BASIC, the instruction to kick a ball 
would look something like

   

  "Kick the Ball"

   

  Hey-this is how we talk! It makes sense. You have a verb (kick) and then a 
noun (the ball). In the BASIC code in the preceding section, you have a verb

  (print) and a noun (an asterisk). Life is good.

   

  Here is the problem. VBA doesn't work like this. No object-oriented language 
works like this. In an object-oriented language, the objects (the nouns) are

  most important (hence, the name: object oriented). If you are going to play 
soccer with VBA, the basic structure would be:

   

  Ball.Kick

   

  You have a noun-the ball. It comes first. In VBA, this is an object

  . Then you have the verb-to kick. It comes next. In VBA, this is a method.

   

  The basic structure of VBA is a bunch of lines of code where you have

   

  Object.Method

   

  Sorry, this is not English. If you took a romance language in high school, 
you will remember that they used a "noun adjective" construct, but I don't know

  anyone who speaks in "noun verb" when telling someone to do something. Do you 
talk like this?

   

  Water.Drink

  Food.Eat

  Girl.Kiss

   

  Of course not. That is why VBA is so confusing to someone who previously 
stepped foot in a procedural programming class.

   

  Let's carry the analogy on a bit. Imagine you walk onto a grassy field and 
there are five balls in front of you. There is a soccer ball, a basketball, a

  baseball, a bowling ball, and a tennis ball. You want to instruct the kid on 
your soccer team to

   

  Kick the soccer ball

   

  If you tell him kick the ball (or ball.kick

  ), you really aren't sure which one he will kick. Maybe he will kick the one 
closest to him. This could be a real problem if he is standing in front of

  the bowling ball.

   

   

  Jim

   

  Jim Homme,

  Usability Services,

  Phone: 412-544-1810. Skype: jim.homme. NonVisualDevelopment.org: Blind people 
can drive computers. Demonstration GUI Programs: You can program GUI's while 
blind. 

   



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