foreach in reverse order

[Dražen Perić]

Is it possible to print array values (with foreach) in reverse order?

Let's say I have this example:

someArray = [0, 1, 2, 3];
self.someArray = ko.observableArray(someArray );

If I print that with foreach, it'll look like:

0
1
2

But, is it possible to print in reverse order, so it can look like:

2
1
0

I know how to do that with for statement, but inside html is possible to use only knockout js foreach statement.

[rpn]

You can do something like this to create a copy of the array and reverse it in the binding:

<ul data-bind="foreach: items.slice(0).reverse()">
    <li data-bind="text: id"></li>
</ul>

[Drazen]

Thanks, it works if I put just .reverse().

But on the other side, I'm wondering, how complexed is that, if I reverse my array every time I "print" it? Because this is actually sorting, and sorting is pretty "expensive", in time complexity, right?

Thanks

[Michael Best]

I recently added a "reverse" option to my repeat binding. So then you could do this:

<ul>
    <li data-bind="repeat: { foreach: items, reverse: true }" data-repeat-bind="text: $item().id"></li>

</ul> 

-- Michael

[maxf...@gmail.com]

I think what you may want is myarray.unshift(newelement) that way you put in front.

On Monday, September 3, 2012 11:05:33 AM UTC-5, Drazen wrote: