curried action

components.my-component.js

import Ember from 'ember';

export default Ember.Component.extend({
});

controllers.application.js

import Ember from 'ember';

export default Ember.Controller.extend({
  appName: 'Ember Twiddle',
  
  model: {
    title: 'test'
  }, 
  
  actions: {
  	updateProperty(property, value) {
      console.log(property, value);
      this.set(`model.${property}`, value);
    }
  }
  	
});

templates.application.hbs

<h1>Welcome to {{appName}}</h1>
<br>
<br>
{{my-component
  title=model.title
  update=(action "updateProperty")}}
<br>
<br>

templates.components.my-component.hbs

<label>Title: {{title}}</label>
<input value={{title}}
  onkeyup={{action (action update "title") value="target.value"}}>

twiddle.json

{
  "version": "0.10.7",
  "EmberENV": {
    "FEATURES": {}
  },
  "options": {
    "use_pods": false,
    "enable-testing": false
  },
  "dependencies": {
    "jquery": "https://cdnjs.cloudflare.com/ajax/libs/jquery/1.11.3/jquery.js",
    "ember": "2.10.0",
    "ember-data": "2.10.0",
    "ember-template-compiler": "2.10.0",
    "ember-testing": "2.10.0"
  },
  "addons": {}
}