[英]Removal of item from ko.observableArray
I want to remove an object from an ko.observableArray I have two observableArrays 我想从ko.observableArray中删除一个对象,我有两个observableArrays
self.arrayA = ko.observableArray();
self.arrayB = ko.observableArray();
then in a function I want to remove an item. 然后在一个功能,我想删除一个项目。
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. “ arrayToRemoveFrom.remove(item)”行导致异常,表示remove不是函数。 What would be the best way to remove "item"?
删除“项目”的最佳方法是什么?
remove
is a special function of the ko.onservableArray
. remove
是ko.onservableArray
的特殊功能 。
However when you write self.arrayA();
但是,当您编写
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. 最后带有
()
的您将返回不具有remove
函数的底层JavaScript数组,并且您会收到异常。
To fix your code you just need to remove the ()
: 要修复您的代码,您只需删除
()
:
self.myRemoval = function(item){
var arrayToRemoveFrom;
if ( somelogic ) {
arrayToRemoveFrom = self.arrayA;
}
else {
arrayToRemoveFrom = self.arrayB;
}
arrayToRemoveFrom.remove(item);
}
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