How to clear an observable array?

[greengiant]

I dont see a clear method in documentation for observableArray. What
is the best way to clear all items out of the array. Is it splice(0)?

[rpn]

To clear an observableArray you can set the value equal to an empty array.  

viewModel.items = ko.observableArray([ { name: "one" }, { name: "two" } ]);

//clear all

viewModel.items([]);

[beic...@gmail.com]

Probably just set the observable's value to an empty array:

obsArray([]);

[daniel....@gmail.com]

Shouldn't it work the same was as native js and let you set the array.length=0. Also ensures no memory leaks if other objects holding references to the array?

Dan

[rpn]

Sure, you could do that as long as you operate on the underlying array.  viewModel.items().length = 0;

[Diego Guidi]

why not removeAll() ?

[msudhaka...@gmail.com]

Hi

When i make ajax call  by initializing this way

$ajax({

success : function(data) {

// some data....

                   pageViewModel.rows().push(rowtoPush);

  }

});

pageViewModel= new pageViewModel();

function pageViewModel(){
 var self=this;

this.rows=ko.observableArray([]);
}

And my question is 

When i run it first time it works good. When i do refresh the page with calling the same ajax that it added the same data in rows() addition to previous.

To solve that i used pageViewModel.rows([]); 

By using this i able to make the empty rows() before calling the ajax. I am able to reset the array. But the data is not binding to the UI even it has the new data in rows().

How can i solve this???

pleas help me....

[Miguel Castillo]

As Diego suggested above, I would suggest you call removeAll...  As far as the refresh of the page goes...  What do you mean you refresh the page?  You press F5?  Or you have a way to refresh the content of the container that has the binding in your application?

Fildder illustration would help.  But, you normally lose the binding the way you are explaining when the "refresh" is removing the html element you have done your binding on.

[geomo...@gmail.com]

rpn method is the best because removeAll() also refresh the array, for example if you saved that value in another variable that variable also gets emptied or refreshed

[Rakesh Chaudhari]

Thanks for the tip, I was stucked for whole day because of This problem. :)