can-model-list-filter.js

can.Model.List.prototype.filter = function(cb) {
    var res = [];
    debugger;
    this.each(function(amodel, pos, models) {
        var ares = cb.call(amodel, pos, models);
        if (ares === true) {res.push(amodel)}
    }); 
    return res
}


// usage
var MyModel = can.Model({});
var myInst = new MyModel.List([{attr1: 1, att2: 2}, {attr1: 'one', att2: 'two'}]);
t = myInst.filter(function(pos, list) {
    // this = an item in list - should return true (not just a non-falsy value) if you want to keep that item
    if (pos % 2 == 0) {return true;}
});