Underscore.js_mixin:_.altWhere

underscore.js_mixin._.altWhere.js

// Return an object who's members match choice of parameters
// Extends underscore _.where concept
// params={gender:'M',status:'Staff|Volunteer'};
// obj=[{gender:'M',status:'Staff',name:'Jack'},{gender:'F',status:'Volunteer',name:'Susan'},{gender:'M',status:'Student',name:'Peter'}];
// _.filterObj(obj, params)
// => [{gender:'M',status:'Staff',name:'Jack'}]

_.mixin({

  altWhere:function(obj, attrs) {
    if (_.isEmpty(attrs)) return [];
		
    return _.filter(obj, function(value) {
      var foundArr=[],foundIdx=0,idxCount;
	for (var key in attrs) {
          foundArr[foundIdx] = false;
	  var i,thisValParts = attrs[key].split(/\|/); // you could use a different delimiter
	  for(i=0;i<thisValParts.length;i++){
	    if(thisValParts[i] ===value[key]) foundArr[foundIdx] = true;
	  }
          foundIdx ++;
	} // end for key in attrs
	for(idxCount=0;idxCount<foundArr.length;idxCount++){
	  if(foundArr[idxCount]==false) return false;
	}
	return true; //true;
    });
  }
});