Question

I have this code in jQuery, that I want to reimplement with the prototype library.

// make external links open in popups // this will apply a window.open() behaviour to all anchor links // the not() functions filter iteratively filter out http://www.foo.com  // and http://foo.com so they don't trigger off the pop-ups  jQuery('a[href='http://']').       not('a[href^='http://www.foo.com']').       not('a[href^='http://foo.com']').       addClass('external');  jQuery('a.external').       not('a[rel='lightbox']').click( function() {       window.open( jQuery(this).attr('href') );       return false; }); 

How can you iteratively filter an collection of elements using an equivalent to the not() operators listed here in jQuery?

Answer 1

The filtering can be done using the reject method like so:

$$('a').reject(function(element) { return element.getAttribute('href').match(/http:\/\/(www.|)foo.com/); }).invoke('addClassName', 'external');