I have searched this site and also googled but can't seem to find the answer.
I need to create object instances dynamically where the instance name is provided as variable, so rather than access the object properties using:
var n = 'abcd';
eval('var '+n+' = new myinst();');
abcd.property = value;
I need to access using a variable:
['abcd'].property = value;
But this does not appear to work - what am I missing ?
You shouldn't be using eval in that way. You can easily assign "dynamic" variables to some base object instead:
var baseObj = {};
var n = 'abcd';
baseObj[n] = new myinst();
baseObj[n].property = value;
This gives you full control over the variable, including the ability to delete it,
delete baseObj[n];
Or check if it exists,
n in baseObj;
You can do "variable variables" using the array notation, but you need to provide a context for it. In the global scope, that would be the window:
var foo = 'bar';
window[foo] = new myinst();
window[foo].property = 'baz';
alert(bar.property);
Substitute window for whatever other scope a variable variable should live in. Variable variables are really an anti-pattern that shouldn't be used though.
If it's a global you can use:
var n = 'abcd';
window[ n ] = new myInst();
window[ n ].property = value;
