Are javascript objects inside an array removed from memory when the array is cleared?

Question

I never thought about garbage collection, and I don’t know whether to take into account when creating small javascript games / applications. Any advice is appreciated, but I will ask my specific question at the end.

Many times I write code of this form:

var foos=new Array();
generateFoos();
function generateFoos()
{
    foos=[];
    for (fooIndex=0;fooIndex<numberOfFoos;fooIndex++)
    {
        foos[fooIndex]=new foo(Math.random(),Math.random());
    }
} 
function foo(bar,bas)
{
   this.bar=bar;
   this.bas=bas;
}

So my question is: when I say foos=[](line 5), does it delete objects from this array from memory or floats somewhere, making the program larger and slower? What if I want to call generateFoos()loooot once, for example, every time the user presses a key.

Thank!

Answer 1

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:

var numberOfFoos = 10,
    foos = [];

var generateFoos = function(){

    foos = [];

    for( var fooIndex = 0; fooIndex < numberOfFoos; fooIndex++ ){

        foos[ fooIndex ] = new foo( Math.random(), Math.random() );

    }

},

foo = function( bar, bas ){

   this.bar = bar;
   this.bas = bas;

}

generateFoos();
console.log( foos );

Answer 2

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