Interchange and generated rules

[bredele]

Hi,

My team and I would like to use the interchange plugin but we noticed an error in the [generatedRules](https://github.com/zurb/foundation-sites/blob/develop/js/foundation.interchange.js#L104) handler. Here's our HTML code:

<img data-interchange="[/path/to/bigger-image.jpg, (large)]">

This method is trying to loop over an array using the for in loop and so, slice some of the array prototype functions.

Thanks for your help.

[bredele]

Just some extra information, we (unfortunately) use extjs which overrides some native methods of the Array prototype and add other methods such as remove.

[jayoakum]

I had the same issue with a similar library.
I was able to get this working for me by wrapping the contents of 'for each' blocks with a hasOwnProperty check.

    for (var i in rules) {
      if (rules.hasOwnProperty(i)) {
          // original code
      }
    }

Note: There are several 'for each' blocks in the script.

[colin-marshall]

Closed in #8686. Thanks @jyoakum-swx for the solution!