General List Trouble

ID:157083
 
May 27 2010, 8:10 am
Hi

Can anybody help me with lists? I've tried and tried to work them out but i can't.

Basically, i need to be able to have a list of objects that is always available with a size of 151 that never changes.

Can anybody help me?
May 27 2010, 8:20 am
var/const/list/A = list(/1, 2, "3", /4, ...)</DM>

the const makes the variable unchangeable, though if you are introducing new objects or modifying it in run-time, it is best to take out the const. If you are putting in a path of objects and would like those path to be created at run-time, use newlist() instead.
May 27 2010, 12:29 pm
May 28 2010, 8:21 am
In response to GhostAnime
GhostAnime wrote:
var/const/list/A = list(/1, 2, "3", /4, ...)</DM>

the const makes the variable unchangeable, though if you are introducing new objects or modifying it in run-time, it is best to take out the const. If you are putting in a path of objects and would like those path to be created at run-time, use newlist() instead.

I had a look at the newlist thing, and thats going to be quite hard for a list with a size of 151: a list which may have to grow to 493 in the future...
May 28 2010, 8:36 am (Edited on May 28 2010, 8:44 am)
In response to Darkoro
umm what do you exactly mean by 'size'? If you mean it as the list length then you could have a method.
var/list/The_List == var/list/The_List[0] // both are same and both are just list references
var/list/The_List[151] // this creates a list with length 151


and this is how you set any value in the list

The_List[1]="One" // the first index of the list is now the string "One"
The_List[2]=2 // thee second index is now the integer floating value 2
The_List[3.... and so on till 151]

If I am wrong then I can join with you for learning!

EDIT: The above listed lists are empty.Its just like a jeans with 151 pockets but nothing in it.
May 28 2010, 9:44 am
In response to Darkoro
Just initialize it at runtime (world/New() perhaps), by going through typesof() to get a list of types and adding a new instance of each to the list.
May 28 2010, 11:02 am (Edited on May 28 2010, 11:32 am)
In response to Garthor
thnx Garthor for letting me see what he wanted!
proc/get_thelist()
 var/list/templist=typesof(/obj/theobj)
 .=newlist(templist)


That or This is what you want.

proc/get_thelist2()
 var/list/My_List[151]
 for(var/i=My_List.len,i>0,i++)
  My_List=new/obj/theobj // this causes all index in the list to have the same type of obj.And there would be 151 such objs.


Lets Elaborate this.

First Case:
Suppose you have the 'obj' data tree like this
obj // the byond specified datum
 theobj  // the 'you' specified datum
  theobj_kid1 // first kid of theobj
  theobj_kid2 //second kid of theobj
 aobj // a kid of 'obj' and the parent of aobj_kids(including 1 and 2)
  aobj_kid1 // kid of aobj
  aobj_kid2  // kid of aobj


Keep the family tree on ur mind.

/*
What is typesof()? Use the reference!
I ll Illustrate
typesof(obj) --> gives a list = list(/obj,/obj/theobj,/obj/theobj/theobj_kid1,/obj/theobj/ theobj_kid2,/obj/aobj,/obj/aobj/aobj_kid1,/obj/aobj/ aobj_kid2)

so typesof(obj) returns the type /obj and all its kids(derivatives)

now you can figure out that
typesof(theobj) makes a list containing /obj/theobj,/obj/theobj_kid1,/obj/theobj_kid2.
newlist(list(A,B,C))/* is same as */list(new A,new B,new C)
/*in our case*/ newlist(templist)=list( new/obj/theobj, new/obj/theobj_kid1,new/obj/theobj_kid2)


This procedure loads all derivatives of theobj in to the list.

Case Two:

This should be pretty much easy to understand, and I dunno if it is the efficient way.

so first it creates a My_List of size 151.
Then it goes for a for loop, and creates a new instance of 'theobj' and assigns it to every index of the My_List.

This will give you a list containing 151 'theobj's!

if you can be more specific probably I would exactly know what you are trying to do.
May 28 2010, 2:02 pm
In response to Soul Sign
Soul Sign wrote:
thnx Garthor for letting me see what he wanted!
> proc/get_thelist()
>  var/list/templist=typesof(/obj/theobj)
>  .=newlist(templist)
>

That or This is what you want.

> proc/get_thelist2()
>  var/list/My_List[151]
>  for(var/i=My_List.len,i>0,i++)
>   My_List=new/obj/theobj // this causes all index in the list to have the same type of obj.And there would be 151 such objs.
>

Lets Elaborate this.

First Case:
Suppose you have the 'obj' data tree like this
> obj // the byond specified datum
>  theobj  // the 'you' specified datum
>   theobj_kid1 // first kid of theobj
>   theobj_kid2 //second kid of theobj
>  aobj // a kid of 'obj' and the parent of aobj_kids(including 1 and 2)
>   aobj_kid1 // kid of aobj
>   aobj_kid2  // kid of aobj
>

Keep the family tree on ur mind.

/*
What is typesof()? Use the reference!
I ll Illustrate
typesof(obj) --> gives a list = list(/obj,/obj/theobj,/obj/theobj/theobj_kid1,/obj/theobj/ theobj_kid2,/obj/aobj,/obj/aobj/aobj_kid1,/obj/aobj/ aobj_kid2)

so typesof(obj) returns the type /obj and all its kids(derivatives)

now you can figure out that
typesof(theobj) makes a list containing /obj/theobj,/obj/theobj_kid1,/obj/theobj_kid2.
> newlist(list(A,B,C))/* is same as */list(new A,new B,new C)
> /*in our case*/ newlist(templist)=list( new/obj/theobj, new/obj/theobj_kid1,new/obj/theobj_kid2)

This procedure loads all derivatives of theobj in to the list.

Case Two:

This should be pretty much easy to understand, and I dunno if it is the efficient way.

so first it creates a My_List of size 151.
Then it goes for a for loop, and creates a new instance of 'theobj' and assigns it to every index of the My_List.

This will give you a list containing 151 'theobj's!

if you can be more specific probably I would exactly know what you are trying to do.

Basically, im helping a mate make a pokemon game, and we are starting with the first 151 pokemon. However, we are using DNA to merge with the humans to make a Gijinka.

anyway, i need to create a list with each of the 151 different DNA objects in it that i can access on a whim when i need to in the code.
May 28 2010, 9:54 pm
In response to Darkoro
I assume your DNA requires graphics. But anyway here's how.

//The DNA2List()
//this is your DNA obj tree
obj
 god_of_DNAs // All the 151 DNA's are the kids of this obj
  var/pokemon_color
  var/pokemon_type
  var/pokemon_eyecolor 
  var/pokemon_nature // and all genes can be varred over here
  First_Pokemon
   pokemon_type="grass" // or wat ever you want
   // in the same manner set the information of the p'mon DNA
  Second_Pokemon
   //blasasasa 
  Third_Pokemon
   //.... .... ... ...
  //till the 151th PokeMon
var/global/DNA_List
proc/DNA2List()
 var/list/temp_list=typesof(/obj/god_of_DNAs)
 temp_list-=/obj/god_of_DNA // remove the god else there will be 152 pokemon dna's. (this is because typesof() also includes /obj/god_of_dna.But we need only from the first pokemon's _dna to the last dna
 DNA_List=newlist(temp_list)
 return DNA_List

DNA2List() returns a list of DNAs which is directly assigned to the global list 'DNA_List'. So you can access the DNA_List from your home to anywhere in the globe.

so now retrieving information from the list is like:
 
proc/Get_DNA_Info(var/index) // index is the DNA number ex(1,2,3,...151)
 var/obj/god_of_DNA/dna=DNA_List[index] //  
 var/dna_type=dna.pokemon_type //retrieve the info pokemon_type


Hope that clears.
May 28 2010, 11:10 pm
In response to Soul Sign
That has helped a lot, thanks soul sign.

I have one final question:

I am trying to make a GM/MGM verb that allows the user to give another member a DNA file from the list of 151. Any ideas how i could go about doing this?

Heres what i had:

mob/MGM/verb
    Give_DNA_File(mob/M in world, obj/O in DNA_List)
        M.contents += new O


But this will not allow me to pick an object in the list on run-time.

Any thoughts?
May 28 2010, 11:19 pm
In response to Darkoro
If O is an instance of an object, "new O" is invalid: the thing that follows the new keyword needs to be a type. Use "new O.type" instead.
May 29 2010, 12:00 am
In response to Garthor
All I'll do is explain what Garthor said. =P

Garthor wrote:
If O is an instance of an object, "new O" is invalid: the thing that follows the new keyword needs to be a type. Use "new O.type" instead.

yes, as he said new must be followed by a type.
Whats a type ? (/obj/Head) this is a type. but 'Your Head' is not a type it is an instance.But the type of 'Your Head' is /obj/Head.So My Head, Your Head and all Heads in the Universe are instances but they are all of the same type /obj/Head. (probably you know this already, so ignore this paragraph )

Wrong and Why ?
> mob/MGM/verb // ok
>   Give_DNA_File(mob/M in world, obj/O in DNA_List) // i ll reform this line later
>       M.contents += new O // wrong : new is supposed to be followed by a type and not an instance or object.\because O here is an instance.
>


Correction and How ?
mob/MGM/verb
 Give_DNA_File(mob/M in world,obj/O in DNA_List) // this should  work if it doesn't try the next code block discarding the obj argument in this line
  /*var/obj/O=input("Choose the DNA","DNA Giver") as null|anything in DNA_List
  if(!O)
   src<<"You canceled the Give!"
   return*/
  M.contents += new O.type // as Garthor said.
>