Use Object.createProperty to make new Array methods non-enumerable

[CelticMinstrel]

Use Object.createProperty to make new Array methods non-enumerable

[ondras]

First and foremost, JS Arrays shall be iterated via

for (i=0; i<arr.length; i++)

and NOT using "for (var p in arr)" notation. This might be common in other languages (PHP comes to mind), but is generally frowned upon in JS. Alternatively, a functional notation (forEach) is also suitable.

Not only numeric iteration completely prevents the issue mentioned above; it is also way faster. Iterating through object keys internally creates a new array (as in Object.keys()) and walks through its items. Direct numeric access does not require any temporary array. Please re-factor your code so you iterate arrays numerically.

Finally, the general idea with non-enumerable properties does not sound bad, but I doubt that all canvas-supporting browsers will be able to handle that (Opera 10/11 comes to mind). I will investigate the level of support.