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

  • From: "Homme, James" <james.homme@xxxxxxxxxxxx>
  • To: "programmingblind@xxxxxxxxxxxxx" <programmingblind@xxxxxxxxxxxxx>
  • Date: Tue, 12 Apr 2011 15:41:11 -0400

Hi Ty,
Add me to Skype. My Skype handle is jim.homme. Good luck. You will have to 
bring out the pabulum.

Jim
Jim Homme,
Usability Services,
Phone: 412-544-1810. Skype: jim.homme. NonVisualDevelopment.org: Blind people 
can drive computers<http://www.nonvisualdevelopment.org/>. Demonstration GUI 
Programs: You can program GUI's while blind.<http://www.fruitbasketdemos.org/>

From: programmingblind-bounce@xxxxxxxxxxxxx 
[mailto:programmingblind-bounce@xxxxxxxxxxxxx] On Behalf Of Littlefield, Tyler
Sent: Tuesday, April 12, 2011 3:30 PM
To: programmingblind@xxxxxxxxxxxxx
Subject: Re: Now I Know Why I'm Having Trouble With Objects

Jim: I've got some free time tonight, do you want to skype? I can throw some 
ideas at you.
On 4/12/2011 1:26 PM, Homme, James wrote:

Hi,

If it's OK, I'd like to take this a little further. I was thinking about my  
little chess move validation project. I thought I would sit down and try to 
write out a little plan, because my book says that the nouns become objects, 
but I started to get confused when I asked myself this question. Do the pieces 
move, do the squares on the board somehow get pieces, or does some controller 
in the sky move the pieces? In the real world, the controller would be the 
player who is moving the pieces. The pieces can't move them selves, and all the 
board can do is sit there and have pieces on its squares. The rules would be 
another object, would they not? Oh my head.



Jim



Jim Homme,

Usability Services,

Phone: 412-544-1810. Skype: jim.homme. NonVisualDevelopment.org: Blind people 
can drive computers<http://www.nonvisualdevelopment.org/>. Demonstration GUI 
Programs: You can program GUI's while blind.<http://www.fruitbasketdemos.org/>



From: 
programmingblind-bounce@xxxxxxxxxxxxx<mailto:programmingblind-bounce@xxxxxxxxxxxxx>
 [mailto:programmingblind-bounce@xxxxxxxxxxxxx] On Behalf Of Homme, James
Sent: Tuesday, April 12, 2011 3:20 PM
To: programmingblind@xxxxxxxxxxxxx<mailto:programmingblind@xxxxxxxxxxxxx>
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<http://www.nonvisualdevelopment.org/>. Demonstration GUI 
Programs: You can program GUI's while blind.<http://www.fruitbasketdemos.org/>





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--



Thanks,

Ty

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