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jonathancounihan/ko.subscribeChanged .js

Last active August 29, 2015 14:02
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knockout subscribeChanged (Thanks to mbest!)
Raw
ko.subscribeChanged .js
ko.subscribable.fn.subscribeChanged = function (callback) {
var savedValue = this.peek();
return this.subscribe(function (latestValue) {
var oldValue = savedValue;
savedValue = latestValue;
callback(latestValue, oldValue);
});
};
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