Update another property, when a property changes?

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I want to create a dependent property on my javascript object. I have an object like in the code snippet. I want to update isPawn property; when isNew property changes.

Is there a way for do something similar that automatically;

if(isNew){
   isPawn = true;
}

But they are not have to be same. isNew can be 'false', when isPawn is 'true'

My Object:

var Soldier = function (id,name) {
    this.id = id;
    this.name = name;
    this.isPawn = false;
    this.isNew = false;
}

Yes, you can do this using a setter, here is an example:

class Soldier {
  #isNew = false;
  constructor(id,name) {
    this.id = id;
    this.name = name;
    this.isPawn = false;
  }

  set isNew(val) {
    this.#isNew = val; 
    this.isPawn = val;
  }

  get isNew() {
    return this.#isNew;
  }
}

const soldier = new Soldier();
soldier.isNew = true;
console.log('isNew:', soldier.isNew, 'isPawn', soldier.isPawn);
soldier.isNew = false;
console.log('isNew:', soldier.isNew, 'isPawn', soldier.isPawn);
soldier.isPawn = true;
console.log('isNew:', soldier.isNew, 'isPawn', soldier.isPawn);

How to: Implement Property Change Notification, Then for each property you want change notifications for, you call OnPropertyChanged whenever the property is updated. C# Copy. What you may wish to consider doing is registering a method with the dependency property which will be invoked when the property changes. This is most easily done when creating the PropertyMetadata for the dependency property. I believe the following example does what you're looking to do.

Make a class and instantiate as needed

class Soldier {
  constructor(id, name, isNew) {
    this.id = id;
    this.name = name;
    this.isPawn = isNew? true : {something : "whaterverElse"};
    this.isNew = isNew;
  }
  
  DoSomething(){
    this.isNew = false;
  }
  
}

var soldier = new Soldier(1, 'Tim', true);

console.log(soldier);

function somethingElseHappened(){
  soldier.DoSomething();
}

somethingElseHappened();

console.log(soldier);

The UpdateSourceTrigger property, As of writing, all properties except for the Text property, is updated as soon as the property changes (PropertyChanged), while the Text property is updated when  I have a ViewCell that is part of a List that is in a ScrollView that has a bunch of Users Profiles. In that ViewCell I have a bindable property attached to an Image. That Image has a Gesture Recognizer that watches for taps. So it acts like a button but is just an image.

you can make a default values for this properties like this:

var Soldier = function (id,name,isPawn = false,isNew = false) {
    this.id = id;
    this.name = name;
    this.isPawn = isPawn;
    this.isNew = isNew;
}

and if you want to change there values to any object for you just do like this:

var newSolider = new Solider(1,"foo",false,true);

INotifyPropertyChanged Is Obsolete, Your WPF view will be updated whenever the property changes. For example: WPF makes it really easy to bind one control to another. You might bind the  I've got a class with a property TotalCost, which is calculated by some simple math of two other properties, CostOfFood and NumberOfPeople.The code works the way I want it to, but I was wondering if this is a satisfactory method in the long run of application development, a bad idea to have one property that depends on another all together (I'm pretty sure this is the case, but sometimes it

Creating and Pushing Property Changes, Property changes may result from device interrupts and polled values. ThingWorx platform to ask for property values it wants and update them automatically. Introduction. This post provides an example of how you can perform view related actions in response to a change to an existing dependency property, in this case the TextBlock.Text property, and how you can determine which action to take based on the difference between the old value and current value of this dependency property.

WPF and Notifying Property Change, For instance, if you bound a XAML text box to a class property called bound to) notifies the GUI that it should ask for an updated value. If you have a suggestion for improvement, I'd be happy to add another step to the mix. How to: Implement Property Change Notification. 03/30/2017; 2 minutes to read +8; In this article. To support OneWay or TwoWay binding to enable your binding target properties to automatically reflect the dynamic changes of the binding source (for example, to have the preview pane updated automatically when the user edits a form), your class needs to provide the proper property changed

How to Write a Property Change Listener (The Java™ Tutorials , Property-change events occur whenever the value of a bound property changes for a bean — a component that re-compute payment and update field } }  Dependency Property Callbacks and Validation. 03/30/2017; 7 minutes to read +6; In this article. This topic describes how to create dependency properties using alternative custom implementations for property-related features such as validation determination, callbacks that are invoked whenever the property's effective value is changed, and overriding possible outside influences on value

Comments
  • I think this is (getter/ setter) the solution. But this # thing confused me. What is it for?
  • @İkbal_BLGNR I've edited the question with some details about that.
  • @İkbal_BLGNR I've added an example extending your current function, maybe that is easier to understand.
  • When isNew property changes; is isPawn property gonna change automatically??
  • No, it will not
  • they have not be the same, also they have not be differ. so I think these a best way