How can I search objects over multiple properties (knockout.js+ twitter bootstrap typeahead)?
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I'm at this point :) 

http://blogs.msdn.com/b/rebond/archive/2012/07/18/knockout-js-binding-for-bootstrap-typeahead-plugin.aspx

    // Bootstrap.Typeahead binding: presently requires custom version from gist: https://gist.github.com/1866577.
    // Use like so: data-bind="typeahead: { target: selectedNamespace, source: namespaces }"
    ko.bindingHandlers.typeahead = {
      init: function(element, valueAccessor) {
      var binding = this;
      var elem = $(element);
      var value = valueAccessor();
   
      // Setup Bootstrap Typeahead for this element.
      elem.typeahead(
      {
        source: function() { return ko.utils.unwrapObservable(value.source); },
        onselect: function(val) { value.target(val); }
      });
 
    // Set the value of the target when the field is blurred.
    elem.blur(function() { value.target(elem.val()); });
      },
       update: function(element, valueAccessor) {
    var elem = $(element);
    var value = valueAccessor();
    elem.val(value.target());
      }
     };

I have X class with 4 properties. 

I want to search X object array  over its 3 properties. (Other property is id)

Any idea?