Some questions about alias (><)

[Khoa]

I'm trying to learn RGSS, and I don't know exactly about alias (><).
If can, someone please answer some of my questions:

• alias add code on top or bottom of the method?
• Does it allow me to add code in the middle of the method? And how to do that?
• Does it allow me to replace instead of add? And how to do that?

Please help me if you know (^^).
And thank you for reading my topic (^^).

 

[Kain Nobel]

Spoiler: alias add code on top or bottom of the method?

Yes, that is exactly what an alias does!

Spoiler: Does it allow me to add code in the middle of the method? And how to do that?

I presume that it could, haven't tried it before. It'd probably be carried out like so...

class Example
  alias_method :your_initialize, :initialize
  def initialize
    # Some code...
    your_initialize
    return
    # Some code...
  end
end

That raises a question to me, is it possible to call more than 1 alias without a stack level too deep?

Spoiler: Does it allow me to replace instead of add? And how to do that?

No, to replace a class's method, you'd just re-write it entirely. As long as the script is below the script you're aliasing to, it should work.

 

[Khoa]

thank you, Kain Nobel (^^)

class Example
  alias_method :your_initialize, :initialize
  def initialize
    # Some code...
    your_initialize
    return
    # Some code...
  end
end

Could you please tell me what is below def initialize and what is below your_initialize?
I get a headache when trying to understand it by myself (><)

 

[mechacrash]

im not sure what the difference between:

alias old_initialize initialize

and:

alias_method :your_initialize, :initialize

is but i use the former... its seems easier.
What it does is store the original data that was under the definition initialize (for instance) and puts it into a new command (old_initialize).

in other words you can store an old method:

alias old_main main
alias old_bgm_play bgm_play
alias cookies initialize
alias newname oldmethodname

as anything and then call it under its new name wherever.

alias old_main main
def main
  #mycode
  old_main
end

i always call the new method old_originalname but it can be anything (as shown with the cookies reference)... does that help?

 

[Khoa]

I understand now, thank two of you, mechacrash and Kain Nobel (^^)

 

[bedi nik bzez emak]

;D

 

[mechacrash]

so my version... btu with a colon?

why add the colon when it does nothing??

or does it do something???