Automatically create new objects? (with programmatic names)

[roadworrier]

I'm trying to create a new object to use as an associative array automatically.

I can programmaticall y create new variables like this:

for (var i; i < 10; i++) {
  window["foo" + i];
  window["foo" + i] = "moo" + i;
}
// now I have foo0,foo1, foo2, foo3... foo9

And I can create a new object like this:

var myObject = new Object();

but I don't know how to create for example

for (...) {
  var myObject + i = new Object();
}

I want to do this because I'm going to make a cgi call to a C program which includes a date range parameter and various other things. Once I get a large array back I'm going to calculate median, standard deviation, spikes, etc. I want to save the array and those calculations in an object, since I'll potentially get 40 different results back. If I save these properties, then I can cache the calculations and cgi query results, so I don't have to make the same request/calculations twice.

So, I'd like the object name to be something close to my cgi query string. Then before I make the query again, I can see if I already have the object. If I do, I have the data, and the calculations.

When a new date range is selected, though, I would like to be able to delete all the cached objects so they aren't eating browser memory.

Any pointers?

I can do this with a whole slew of automatically created variables, but it would be nicer and more logical to do via objects.

[pbmods]

I want to do this because I'm going to make a cgi call to a C program which includes a date range parameter and various other things. Once I get a large array back I'm going to calculate median, standard deviation, spikes, etc. I want to save the array and those calculations in an object, since I'll potentially get 40 different results back. If I save these properties, then I can cache the calculations and cgi query results, so I don't have to make the same request/calculations twice.

You actually had it pretty much; just combine what you were doing:

[CODE=JavaScript]
for(var $i = 0; $i < 10; $i++)
window['myObject' + $i] = {}; // or = new Object(); your choice...

// E.g.:
for(var $r = 0; $r < 10; $r++)
for(var $c = 0; $c < 10; $c++)
window['myObject' + $r][$c] = ($r * $c);

// Etc....
[/code]

[roadworrier]

window['myObject' + $i] = {};

Perfect! Thanks. It appears to do just what I want in my tests. Somehow I didn't think I could create objects as properties of the object 'window' the way I could with regular variables/properties.

Much appreciated.