Question

How to add all values to observableArray in one time? Adding values in loop works very slow in my case. Here is jsfiddle example.
jsfiddle

Answer 1

Since you’re clearing out the entire observable array, one way you can accomplish this is:

var viewModel = {
    name: "base",   
    addingValue:new ko.observable(),
    someArr: new ko.observableArray(["123","432","sdafasd","xrere"]),
    add: function()
    {
        this.someArr.push(this.addingValue());
    },
    updateSomeArr:function()
    {
        var temp = [];

        for(var i=0;i<5;i++)
        {
            temp.push("555565");
        }

        this.someArr(temp);
    }
}