A bunch of questions to help me and other people fluent in programming learn Ruby and RGSS3 faster.

[_Shadow_]

Kudos to Yato!

So instead of making a hell of a spam to you people, I gathered some questions I have in one thread.

First off a few things about me.

I am fluent in Procedural and Object Oriented Programming concepts.
I can script in Python, Java, and some more programming languages.
I can NOT script in Ruby though (syntax is not known yet) but I can hopefully understand what I read.

In other words, do not be afraid to talk to me using programming terms. We speak the same language on that part.

I just don't know well the Ruby dialect.

I put them in spoilers so it won't be a huge wall.

So here I shoot:

Question 1: (answered)

Spoiler

http://forums.rpgmak...events/?p=70304

params = []
choices = []
choices.push("choice 1")
choices.push("choice 2")
params.push(choices)
params.push(0/1/2 this part is where you press cancel and which choice to default)
setup_choices(params)

What I see (correct me if I am wrong) Q1.0:

Params and choices are vecors, like one dimention arrays

you add into the choices vector two choices using the method push.

then you push the whole vector choices into params. (WHY IS THAT?)

Then you add into params something. I am not sure what since it is an instruction in the parentheses.

Finally you use a method setup_choices(params) (Does that show the choices on screen? What is going on?)

Q1.1: Can you please show me how to show 10 choices for instance? No I don't wanna use Hime's script, I just wanna learn how to use the code above in a proper way and syntax.

Q1.2: Also, how should I handle these choices? Is it a good idea to use a variable and an IF condition? (first thought).

Question 2: (answered)

Spoiler

 A working project expample with let's say 7 choices would be perfect for question 1

Can somebody make one to show me how it is done correctly?

Question 3: (answered)

Spoiler

Can someone explain me what this guy is talking about on the first part of his 

comment.
http://forums.rpgmakerweb.com/index.php?/topic/6248-script-call-equivalent-of-events/?p=87420

Question 4: (answered)

Spoiler

Can I have a 100% working example of some stuff, so I can learn the syntax of Ruby?

A project that demostrates them would be perfect too. 

Q4.1: For loop that does for i = 1 to 10 show HELLO WORLD
Q4.2:

 IF variable1 = 1 THEN show HELLO WORLD1 
ELSE IF variable1 = 2 THEN show HELLO WORLD2
ELSE
show HELLO WORLD Default
END IF

Question 5:(answered)

Spoiler

Is there a "Case" command Equivalent? that can substitute the IF used above? 

Like the Select Case command on other programming languages.

Question 6:(answered)

Spoiler

Can you show me a working While loop with an exit command that does the same as the For Loop of 4.1?

Question 7: (answered)

Spoiler

Q7.1: How do you declare your own class, like named ExampleClass with a local, and a global variable, how do you syntax its constructor, 
and how do you create a method inside it that shows 
"hello world ", global_variable_value
 

Q7.2: How do you make an instance of ExampleClass, named exampleInstance?

These seven questions can really lift my learning curve on Ruby and RGSS3 related stuff.

And it can be really helpful for anyone else fluent in other languages to do the leap in Ruby.

Thanks for your time people.

Whoever gives me any answers I will really appreciate it.

Thought thread with so many questions is not a good thing.

But on the other hand, nobody wants a spam of seven different threads, when these can merge under a common theme.

 

[Yato]

This is a bit much to tackle at the same time. I'm going to skip the choice-related questions for the moment as I have no experience messing with it.

Q4.1:

for i in 1..10 p "Hello World"endOf note, .. is a range that includes the last element, ... does not. So 1..10 is 1 to 10 and 1...10 is 1 to 9.Q4.2:

if $game_variables[1] == 1 p "hw1"elsif $game_variables[1] == 2 p "hw2"else p "default"endQ5:

case $game_variables[1]when 1  p "hw1"when 2  p "hw2"else  p "default"end

Q6:

i = 1while i <= 10  p "hello world"  i += 1end

I can't say I use while loops very often, so there might be nicer syntax I don't know of.Q7 incoming.

 

[_Shadow_]

Once again Yato delivers!

Thank you so much!

 

This will really speed things up! 

 

[Yato]

It's a little strange on my head going back to Ruby when I've largely been working in Python for the last couple months, haha. For seven, I'm kind of assuming on some of your terminology. I assume when you say local variable, you mean only accessible within that class? Like a private variable in Java? And by global, you mean accessible outside of the class?

class ExampleClass # < OptionalInheritance attr_accessor :global_variable def initialize #initalization method here @local_variable = 0 @global_variable = 0 end def say_hello p "hello world " + @global_variable.to_s endendattr_reader is equivalent of making a function like follows:

def variable  return @variableend

attr_writer is equivalent to making the following:

def variable=(v)  @variable = vend

attr_accessor is reader and writer in one.Q7.1:

exampleInstance = ExampleClass.newexampleInstance.say_hello

If your initialization method had variables, it would just become

exampleInstance = ExampleClass.new(1, 2, etc)

Now it's time to dig into this choice stuff.

 

[_Shadow_]

 I assume when you say local variable, you mean only accessible within that class? Like a private variable in Java? And by global, you mean accessible outside of the class?

Yes! Exactly! I was talking about scope inside a class and outside of it.

One accessible by class members only and one accessible by.... anything indeed.

Oh! So you give access to a variable outside the class using attr_accessor directive? Is that it?

.to_s 

Can I assume this is a .to-string converter method?

do we add @ before a variable name or do we add it before a variable name into a class?

attr_writer

attr_reader

attr_accessor

Are these things declared before the constructor as in your example?

Wow! Cool. You really help me a LOT outta here! 

 

[Yato]

Local variables do not have anything in front of them and can only be used in the method they are created.


Instance variables (@) can be accessed with the instance of the class.


Class variables (@@) are class variables and are shared among every instance of that class. (used in the default scripts for things like remembering the cursor position every time you open the menu)


Global variables ($) can be accessed anywhere (such as $game_variables). These should be used as little as possible and only when absolutely necessary.


.to_s is indeed a to string convertor method.


attr_s do not need to go before initialization as far as my limited testing implies. I just put them there by habit/following the default scripts.

 

[_Shadow_]

Fantastic.

My goodness.

If you figure out how to help me on the first three (that are on the same issue really)

you really did cleared the whole thread on your own! 

 

[Yato]

For the setup_choices method, it is basically expecting the variable to be a single array where the first element is another array of the various choices to display and the second element is the "cancel" choice (what action the game takes when the user hits the cancel button). So assuming unlimited space (which the script command does not have), you could set up the params as follows as well:

params = [["choice1", "choice2", "choice3", "etc"], 0]Note that I'm working on a version of Ace that does not have the larger script box. This makes setting up choices in this way nearly impossible. It is kind of a pain to work with, but here is my working example, condensed to fit in the tiny box:

Script:params = []; choices = []choices.push("1"); choices.push("2")choices.push("3"); choices.push("4")choices.push("5"); choices.push("6")choices.push("7"); choices.push("8")choices.push("9"); choices.push("10")params.push(choices)params.push(0)setup_choices(params)Script:Fiber.yield while @branch[@indent] == nil$game_variables[1] = @branch[@indent]

Variable 1 then has your choice saved. 0 is the first choice. I chose to save it in a variable due to script box size limitations plus then you can go back to using event commands. The fiber yield line exists so that the code does not move on until a choice is made.I hope that more or less answers 1-3. I think Tahlan was more or less just asking how to use the scripted show choice.

 

[_Shadow_]

Outstanding.

I am speechless.

 

[Shaz]

This thread is being closed, due to being solved. If for some reason you would like this thread re-opened, please report this post and leave a message why. Thank you.


at OP's request