dynamic javascript variables

[hallsofvallhalla]

Okay so I have created a class in javascript

lets say creatures

i need to create new instances of this class dynamical. Like spawning a new creature

Code: Select all

 var namerand  = Math.floor(Math.random()*9999);
     var creaturename = "creature" + namerand
     creaturename = new axilict();
       creaturename.positionx = 500;
    creaturename.positiony = 500;
      creaturelist.push(creaturename);

this however doesn't seem to work. How can I create the dynamic names and pt them into the array.

DO NOT SAY EVAL()!!!!!!!!!!!!!

[Chris]

You could have pretty much left dynamic out of the topic name . Everything in JavaScript is dynamic.

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Creature = function(name, type, position)
{
    this.name = name == undefined ? "" : name;

    if( position instanceof Vector2 ) this.position = position;
    if( type instanceof CreatueType ) this.type = type;
}

Creature.prototype = {

    constructor : Creature, // Creature function

    name : null,
    type : null,
    position : null,
    stats : null
}

// my adivce would be to make a List object
CreatureList = [];

var myCreature = new Creature( "Random name", CreatureTypeList.axilict);
myCreature.position.set( 60, 9 );

CreatureList.push(myCreature);

[hallsofvallhalla]

thanks for the code!

Well technically

var myname is not a dynamic variable name because i am setting it to a static name while making the variable name depend on a random number makes it dynamic. At least in my definition

[Jackolantern]

It seems what you are asking is for something similar to "variable variables" in PHP. I don't believe JS has them, like most languages do not. However, the functionality is usually not required because the same functionality can be done with arrays since you can piece together the array index key at runtime out of string constants, string variables, the return values from funtions, or whatever else you can think of. Then you just have your object as part of an array instead of floating around free, but that is not of much concern in Javascript since arrays are first-class objects that can do anything any other object can!

[Chris]

Do you want to clone the object?

Try something like this:

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Object.prototype.clone = function()
{
    var Object = function(){};
    Object.prototype = this;
    return new Object();
}

var myCreature = new Creature("lol", CreatureTypeList.axilict);
var mySecondCreature = myCreature.clone();
mySecondCreature.name = "haha";

console.log(myCreature.name) // lol
console.log(mySecondCreature.name) // haha

To make a list of random creatures run a loop to make new instances or clones..

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var myCreatureList = [];

for( var i = 0; i <= 50; i++ )
{
    var randomName = Math.floor( new Date().getTime() * Math.random() ).toString(16);
    var creature = new Creature( randomName , CreatureTypeList.axilict );

    myCreatureList.push(creature);
}

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var myCreatureList = [];

var myCreature = new Creature("", CreatureTypeList.axilict);

for( var i = 0; i <= 50; i++ )
{
    var clonedCreature = myCreature.clone();
    clonedCreature.name = Math.floor( new Date().getTime() * Math.random() ).toString(16); // random name

    myCreatureList.push(clonedCreature);
}