Graal Forums - Bind a variable to a function?

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- - Bind a variable to a function? (https://forums.graalonline.com/forums/showthread.php?t=68388)

Bind a variable to a function?

Ok, after my lack of success in the last thread I'm attempting to build an associative array manually. (Hopefully with more functionaility too, like being able to iterate through it.)

What I want to achieve is standard in OOP, but i'm not sure whether it's possible in GS.

The code will hopefully make more sense:

PHP Code:


		
			
function array(indexes,values) {

  this.inds = indexes;

  this.vals = values;

  this.item = item(); 

  return this;

}



function item(ind) {

   return this.vals[this.inds.index(ind)];

}



//then use like:

arr = array({"a","b","c"},{"one","two","three"});

var = arr.item("b"); //var should be "two"

Is this kind of thing possible? I'm trying to achieve some pretty basic OO functionality.

If this is possible it'd really help me with a lot of scripts.

Thanks.

You can do things like this:

PHP Code:


		
			
myvar = new TStaticVar();

myvar.join("myarrayclass");

and then add functions into myarrayclass.

ah. Thanks.

Joined classes dont seem to get updated when I press apply. I just added a function to one and it's not recongnised. The ones I added originally are.

Also, if I change something it doesn't seem to update.

You need to recreate the TStaticVar. Call a destroy() to it in some script, then remake it. Should work.

Where should destroy go?

Heres what I have:

PHP Code:


		
			
//#CLIENTSIDE



function onWeaponFired() {

arr = new TStaticVar(); 

arr.join("assocarray");

arr.make({"a","b","c"},{"one","two","three"});





echo(arr.put("d","four"));

arr.put("seven","nine");

echo("Has:" @ arr.has("notakey"));

echo(arr.keys());

arr.put("eight","ten");

echo("remove: " @ arr.remove("b"));

echo(arr.keys());



//for(arr.start();arr.off();arr.forth()){

//player.chat = player.chat @ arr.item_for_iteration;

//}



arr.start();

while(!(arr.off())) {

  player.chat = player.chat @ " " @ arr.item_for_iteration();

  arr.forth();

}

arr.destroy();

}

I update the assocarry class and this weapon npc never shows the changes. For example, remove isn't working so i changed..

PHP Code:


		
			
public function remove(key) {

  if (has(key)) {

    this.values.delete(this.keys.index(key));

    this.keys.delete(this.keys.index(key));

    return 0;

  }

  else return 1;

}

PHP Code:


		
			
public function remove(key) {

    this.keys.delete(this.keys.index("b")); //in the example b exists as a key so this should work

    this.values.delete(this.keys.index(key));

    this.keys.delete(this.keys.index(key));

    return "test..."; //return a string instead of a number

}

However, arr.remove("anything"); is still returning 0 instead of "test...".

I added arr.destroy(); to my NPC but it still never updates.

Is it because both the weapon NPC and the class npc have //#CLIENTSIDE ?

UPDATE: If I copy and paste the entire remove function and call it remove2, then call arr.remove2() it will execute as expected. remove() still executes as if it were never changed since the first time I called it even though the code is identical to remove2().

Any ideas? This is a bit strange and highly annoying because I don't know whether the script is working or not because I cant tell whether it's using the latest version of the function.

Fixed. I stopped using the function name remove() and all is fine. Is it a reserved function name or used for something else?

Anyway, it all seems to be working fine now.

Heres my associatve array class. Feel free to use it.

PHP Code:


		
			
//Associative array by JkWhoSaysNi

//#CLIENTSIDE

function duplicates(array) {

  //recursivly check for duplicates in an array

  duplicate = false;

  if(array.size() != 0) {

    for (i = 1; i <= array.size()-1; i++ ) {

      if (array[0] == array[i]) {

        duplicate = true;

      }

   }

   if (duplicate == false) {

     array.delete(0);

     duplicate = duplicates(array);

   }

  }

  return duplicate;

}

/////////////////

//Constructor

/////////////////

public function make(keys,values) {



 //required because keys is passed as a reference to duplicates, which then empties it.

 this.tempkeys = keys; 



 if (keys.size() != values.size() || duplicates(this.tempkeys)) return false; 

  else {

    this.cursor = 0;

    this.keys = keys;

    this.values = values;

    return true;

  }

}

/////////////////

//Access

/////////////////

public function has(key) {

    return (this.keys.index(key) >= 0);

}

public function item(key) {

  if (has(key)) return this.values[this.keys.index(key)];

  else return false;

}

public function has_item(value) {

  return (this.values.index(value) >= 0);

}

public function keys() {

  return this.keys;

}

public function values() {

  return this.values;

}

public function item_for_iteration() {

  return this.values[this.cursor];

}

public function key_for_iteration() {

  return this.keys[this.cursor];

}

public function cursor() {

  return this.cursor;

}

public function count() {

  return this.values.size();

}

public function off() {

  //has the cursor reached the end of the array?

  return (this.cursor > this.keys.size()-1);

}



/////////////////

//Element change

/////////////////

public function put(key,value) {

  //add or replace

  if (has(key)) {

    this.values[this.keys.index(key)] = value;

    return 1;

    }

  else {

    this.keys.add(key);

    this.values.add(value);

    return 2;

   }

}

public function remove_item(key) {

 if (has(key)) {

   this.values.delete(this.keys.index(key));

   this.keys.delete(this.keys.index(key));

   return true;

  }

  else return false;

}



public function replace_key(oldkey,newkey) {

  if (has(oldkey)) { 

    this.keys[this.keys.index(oldkey)] = newkey;

    return true;

  }

  else return false;

}

public function clear_all() {

  this.keys.clear();

  this.values.clear();

  this.cursor = 0;

 }

/////////////////

//Cursor movement

/////////////////

public function forth() {

   if (!off()) {

     this.cursor++;

     return true;

    }

    else return false;

}

public function back() {

  if (this.cursor > this.keys.size()-1) { 

    this.cursor--;

    return true;

    }

  else return false;

}

public function start() {

//Move cursor back to the start

  this.cursor = 0;

}

public function end() {

  this.cursor = this.keys.size()-1;

}

//

//invariant this.keys.size() == this.values.size();

//invariant this.cursor < this.values.size();

// would be nice but not supported.

usage:

PHP Code:


		
			
arr = new TStaticVar(); 

arr.join("associative_array");



//create the array. first param is an array of keys, .second is values. 

//if it works will return true, if there is a problem (e.g. duplicate key) it will return false.

arr.make({"a","b","c"},{"one","two","three"});



//add another element

arr.put("d","four");



//retrieve value for key "d"

var = arr.item("d"); //var == "four"



//change value for key

arr.put("d","five"); //arr.item("d") == "five"



//remove item

arr.remove_item("d");



//iterate through the array

for(arr.start();!arr.off();arr.forth()) {

  player.chat = player.chat @ " " @ arr.item_for_iteration();

}

and a few other functions which you can see by looking at the class.

You can also do:

PHP Code:


		
			
arr = array({"a","b","c"},{"one","two","three"}); 

with(arr) {

  temp.var = item("b"); 

}