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Ember.js Ember.NativeArray invoke() Method

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Ember.js is an open-source JavaScript framework used for developing large client-side web applications which is based on Model-View-Controller (MVC) architecture. Ember.js is one of the most widely used front-end application frameworks. It is made to speed up development and increase productivity. Currently, it is utilized by a large number of websites, including Square, Discourse, Groupon, Linked In, Live Nation, Twitch, and Chipotle.

The invoke() method is used to invoke the named method on every object in the receiver that implements it.

Syntax:

invoke( methodName, args );

Parameters:

  • methodName: It is the name of the method.
  • args: It is the arguments passed to method when invoking.

Return Value: return value from calling invoke.

Step 1: To run the following examples you will need to have an ember project with you. To create one, you will need to install ember-cli first. Write the below code in the terminal:

npm install ember-cli

Step 2: Now you can create the project by typing in the following piece of code:

ember new <project-name> --lang en

To start the server, type:

ember serve

Example 1: Type the following code to generate the route for this example:

ember generate route invoke1

app/routes/invoke1.js

Javascript




import Route from "@ember/routing/route";
class employee {
    name = null;
    mobile = null;
    city = null;
    country = null;
    gender = null;
    zipCode = null;
    constructor(name, mobile, city, country, gender, zipCode) {
        this.name = name;
        this.mobile = mobile;
        this.city = city;
        this.country = country;
        this.gender = gender;
        this.zipCode = zipCode;
    }
    get_add() {
        return `${this.name} is Employee from ${this.city}`;
    }
}
export default class DetailsRoute extends Route {
    details = [
        new employee("Anubhav", "1298119967", "Patna",
            "India", "M", "800020",),
        new employee("Yogesh", "1234567890","Raipur",
            "India","M","402001"),
        new employee("Satyam", "2222222222","Delhi",
            "India","M","110012"),
        new employee("Shivam","1122113322","Patna",
            "India", "M", "530068"),
        new employee( "Ayushi", "2244668800","Jaipur",
            "India", "F", "302001")
    ];
     
    city;
    start;
    end;
    model() {
        return this.details;
    }
    setupController(controller, model) {
        super.setupController(controller, model);
        controller.set("details", this.details);
        controller.set("city", this.city);
        controller.set("start", this.start);
        controller.set("end", this.end);
    }
}


app/controllers/invoke1.js

Javascript




import Ember from "ember";
import { isAny }
    from "@ember/array";
 
export default Ember.Controller.extend({
    actions: {
        getNames() {
            let ans = this.details.mapBy('name');
            alert(ans.join('\n'));
        },
        showAdd() {
            let res = this.details.invoke('get_add');
            alert(res.join('\n'));
        },
        checkFemale() {
            let res = this.details.isAny('gender', 'F');
            alert(res ? `Female employee present in List`
                : `No Female present`);
        },
    },
});


app/templates/invoke1.hbs

Javascript




{{page-title "invoke"}}
<h3>List of People: </h3>
<br /><br />
<table>
    <tr>
        <th>Name</th>
        <th>Gender</th>
        <th>Mobile</th>
        <th>City</th>
        <th>Country</th>
        <th>Zip Code</th>
      </tr>
      {{#each @model as |detail|}}
    <tr>
        <td>{{detail.name}}</td>
          <td>{{detail.gender}}</td>
          <td>{{detail.mobile}}</td>
          <td>{{detail.city}}</td>
          <td>{{detail.country}}</td>
          <td>{{detail.zipCode}}</td>
    </tr>
      {{/each}}
</table>
<br />
<div>
    <input
        type="button"
        id="add-name"
        value="Show all address"
        {{action "showAdd"}}
      />
</div>
<br />
<div>
    <input
        type="button"
        id="check-female"
        value="Check Female"
        {{action "checkFemale"}}
      />
</div>
<br />
<input
    type="button"
      id="get-names"
      value="Get All names from list"
      {{action "getNames"}}
/>
{{outlet}}


Output: Visit localhost:4200/invoke1 to view the output

Ember.js Ember.NativeArray invoke method

Example 2: Type the following code to generate the route for this example:

ember generate route invoke2

app/routes/invoke2.js

Javascript




import Route from '@ember/routing/route';
import { } from '@ember/array';
class fruit {
    name = null;
    isFruit = null;
    color = null;
    constructor(name, isFruit, color) {
        this.name = name;
        this.isFruit = isFruit;
        this.color = color;
    }
 
    show_item() {
        return `${this.name} is ${this.isFruit ? '' : 'not'} fruit`;
 
    }
}
export default class FruitsRoute extends Route {
    fruits = [
        new fruit('Lady Finger', false, 'green'),
        new fruit('Brinjal', false, 'purple'),
        new fruit('Apple', true, 'red'),
        new fruit('Grapes', true, 'green'),
        new fruit('Mango', true, 'yellow'),
        new fruit('Watermelon', true, 'red'),
        new fruit('Orange', true, 'orange')
    ];
    model() {
        return this.fruits;
    }
    setupController(controller, model) {
        super.setupController(controller, model);
        controller.set('fruits', this.fruits);
    }
}


app/controllers/invoke2.js

Javascript




import Ember from "ember";
import { isAny, isEvery } from "@ember/array";
 
export default Ember.Controller.extend({
    actions: {
        showFruit() {
            let ans = this.fruits.invoke("show_item")
            alert(ans.join('\n'));
        },
        alertFruit() {
            let ans = this.fruits.mapBy("name");
            alert(ans.join('\n'));
        },
        checkFruits() {
            let ans = this.fruits.isAny('isFruit', true);
            alert(ans ? "Fruits present in list" :
                "Fruits not present in list")
        },
        checkvegy() {
            let ans = this.fruits.isAny('isFruit', false);
            alert(!ans ? "Vegetables present in list" :
                "Vegetables not present in list")
        },
    },
});


app/templates/invoke2.hbs

Javascript




{{page-title "invoke"}}
<h3>Here is a list of eatables: </h3>
<ul>
    {{#each @model as |eatable|}}
        <li>
              {{eatable.name}}
        </li>
      {{/each}}
</ul>
<br />
<input
    type="button"
      id="fruit-show"
      value="Check Fruits"
      {{action "showFruit"}}
/>
<br /><br />
<input
    type="button"
      id="fruit-all"
      value="Alert all Item names"
      {{action "alertFruit"}}
/>
<br /><br />
<input
    type="button"
      id="check-Fruits"
      value="Check any Fruit"
      {{action "checkFruits"}}
/>
<br /><br />
<input
    type="button"
      id="check-NonFruits"
      value="Check any Vegetables"
      {{action "checkvegy"}}
/>
{{outlet}}


Output: Visit localhost:4200/invoke2 to view the output.

Ember.js Ember.NativeArray invoke method

Reference: https://api.emberjs.com/ember/4.4/classes/Ember.NativeArray/methods/invoke?anchor=invoke



Last Updated : 11 Jan, 2023
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