Arrays: How to use them

[zeinzu21]

Im sorry if this might already be existing but I have quite a few questions regarding arrays.

Here they are:

1. How do we declare an empty array? Currently I am doing this:

setarray guilds[0],"";
//by doing this, I am creating an array "guilds" with 1 element. Not exactly what I wanted

2. Is there a way to push or pop an array element which will automatically shift them?

3. Can we use something like labels in arrays, kinda like javascript's [{label:value,label2:value2},{label:value,label2:value2}]?

[Litro Endemic]

hmm... there is no need to declare an empty array, in case like java script you need declare array first before you use it later-on

Also, an additional question, can we put an array inside an array? I was thinking of doing something like:

setarray details[0],0,1,1,1,1,0;
setarray rows[0],details;
// when I call rows[0] then it will returns an array that contains 0,1,1,1,1,0

yes you can use coppyarray, maybe you need sometime to read documentation for scripting https://raw.githubusercontent.com/rathena/rathena/master/doc/script_commands.txt read this for reference, and for the example you can directly read inside

*copyarray <destination array>[<first value>],<source array>[<first value>],<amount of data to copy>;

This command lets you quickly shuffle a lot of data between arrays, which is in
some cases invaluable.

    setarray @array[0], 100, 200, 300, 400, 500, 600;
    // So we have made @array[]
    copyarray @array2[0],@array[2],2;

    // Now, @array2[0] will be equal to @array[2] (300) and
    // @array2[1] will be equal to @array[3].

So using the examples above:
 @array[0] = 100
 @array[1] = 200
 @array[2] = 300
 @array[3] = 400
 @array[4] = 500
 @array[5] = 600

New Array:
 @array2[0] = 300
 @array2[1] = 400
 @array2[2] = 0
 @array2[3] = 0

Notice that @array[4] and @array[5] won't be copied to the second array, and it will return a
0.

 

[Litro Endemic]

1. maybe you mean to delete an existing array, if yes you can use deletearray.

   setarray .@this, 1, 2, 3; // int type array
   setarray .@this$, "1", "2", "3"; // str type array

   to delete array or empty array  above you can do following

   .@size = getarraysize(.@this);
   deletearray .@this, .@size;

    
2. Is there a way to push or pop an array element which will automatically shift them? yes, you can try this http://herc.ws/board/topic/14817-array-manipulation-functions/ maybe if its not working it will need some adjustment to convert to rA script engine
3. Can we use something like labels in arrays, kinda like javascript's [{label:value,label2:value2},{label:value,label2:value2}]? simply nope afaik

[zeinzu21]

Thanks for the quick response Litro Endemic!

24 minutes ago, Litro Endemic said:

1. maybe you mean to delete an existing array, if yes you can use deletearray.

I really mean declare and empty array. As most languages allow, we can declare :

setarray foo;
// wherein when we use getarraysize(foo), 
// it return 0 until the next "foo[getarraysize(foo)+1] = bar" then it returns 1.

But thanks for those code snippets! Those will come in handy!

31 minutes ago, Litro Endemic said:

2. yes, you can try this http://herc.ws/board/topic/14817-array-manipulation-functions/ maybe if its not working it will need some adjustment to convert to rA script engine 

Thanks for the link! I found the functions very interesting and it seems to have almost all that I need for manipulating the array. I will try and figure how to set this up and test it out.

 

Also, an additional question, can we put an array inside an array? I was thinking of doing something like:
 

setarray details[0],0,1,1,1,1,0;
setarray rows[0],details;
// when I call rows[0] then it will returns an array that contains 0,1,1,1,1,0

 

[zeinzu21]

The upvote is for the link to the full reference. My apologies if I was not clear on the question. What I was looking for was being able to store an array inside an array's element such as:

element 1: 9
element 2: [element1: 44, element2: 24, element3: 95]
element 3: 10

But I can see I should use two dimensional array than look for something like
Object[List<Object>] foo = new Object[100]; // it means I am storing an array inside an array element

But since the resource has been provided, I can have this thread resolved.

Once again, thank you Litro Endemic!

[Litro Endemic]

maybe you need array manipulation since you need to declare empty array, here an example on both

javascript

var winner_rank = [];
var i;
for (i = 0; i < 10; i++) {
	winner_rank[i] = "Winner "+i;
}

// result will be like: Winner 0, Winner 1

athena
 

for (.@i = 0; .@i < 10; .@i++) {
	.@winner_rank$[.@i] = "Winner "+.@i; // type str
}

// result will be like: Winner 0, Winner 1

 

[zeinzu21]

3 minutes ago, Litro Endemic said:

maybe you need array manipulation since you need to declare empty array, here an example on both

javascript

var winner_rank = [];
var i;
for (i = 0; i < 10; i++) {
	winner_rank[i] = "Winner "+i;
}

// result will be like: Winner 0, Winner 1

athena
 

for (.@i = 0; .@i < 10; .@i++) {
	.@winner_rank$[.@i] = "Winner "+.@i; // type str
}

// result will be like: Winner 0, Winner 1

 

ah! Clear and precise! Thanks for the translation!

[Zell]

You can play with implode and explode.

	setarray .@array$[0],"player1:23:swordsman","player2:10:magician";
	mes "Player List";
for( ; .@i < getarraysize(.@array$); .@i++)
{
    explode(.@data$, .@array$, ":");
    mes "Name: " + .@data$[0];
    mes "Level: " + .@data$[1];
    mes "Job: " + .@data$[2];
 }
close;
	

Edited November 5, 2018 by Zell

[zeinzu21]

3 minutes ago, Zell said:

You can play with implode and explode functions.
 

setarray .@array$[0],"player1:23:swordsman","player2:10:magician";

mes "Player List";
for( ; .@i < getarraysize(.@array$); .@i++)
{
	explode(.@data$, .@array$, ":");
	mes "Name: " + .@data$[0];
	mes "Level: " + .@data$[1];
	mes "Job: " + .@data$[2];
 }
close;

Oh I just love that! I am so used to OOP that I am having problems working with NPC scripts but this changes alot! Thanks!