Question

I would like to pass a comparer into a function and not sure if this is possible with Javascript. There is an IComparer concept in C# that does this. Can this be done in Javascript?

function someAction (comparer) {
    var newList = [];
        $.each(list, function (index, item) {
            if comparer on item is true then { //psuedo code
                newList.push(item);
            }
        });
}

someAction(item.PropA > 5);

Answer 1

function someAction (comparer) {
    var newList = [];
        $.each(list, function (index, item) {
            if (comparer(item)) {
                newList.push(item);
            }
        });
}
someAction(function (item) { return item.PropA > 5 });

PS: as @BrokenGlass suggested, you can avoid reinventing the wheel and use the filter function.