CODEWITHSUNDEEP
javascriptknockout.js
Asle G
Asle G

Reputation: 588

Removal of item from ko.observableArray

I want to remove an object from an ko.observableArray I have two observableArrays

self.arrayA = ko.observableArray();
self.arrayB = ko.observableArray();

then in a function I want to remove an item. 

self.myRemoval = function(item){
    var arrayToRemoveFrom;
    if ( somelogic ) {
        arrayToRemoveFrom = self.arrayA();  
    }
    else {
        arrayToRemoveFrom = self.arrayB(); 
    }
    arrayToRemoveFrom.remove(item);   
}

The line "arrayToRemoveFrom.remove(item)" causes an exception, saying remove is not a function. What would be the best way to remove "item"?

Upvotes: 2

Views: 3034

Answers (1)

nemesv
nemesv

Reputation: 139758

remove is a special function of the ko.onservableArray .

However when you write self.arrayA(); with the () at the end you are returning the underlaying JavaScript array which does not have a remove function and you get the exception.

To fix your code you just need to remove the ():

self.myRemoval = function(item){
    var arrayToRemoveFrom;
    if ( somelogic ) {
        arrayToRemoveFrom = self.arrayA;  
    }
    else {
        arrayToRemoveFrom = self.arrayB; 
    }
    arrayToRemoveFrom.remove(item);   
}

Upvotes: 4

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