Ember.js EmberArray isEvery() Method

Last Updated : 20 Jan, 2023

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 isEvery() method is used to check if all the items in the array have the desired value or not.

Syntax:

isEvery( key, value );

Parameters:

key: It is the property name that we want to check.
value: It is the value to test against. The default value is true.

Returns: True if, for all the items in the array, the passed property resolves to the desired value.

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

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 isEvery1

app/routes/isEvery1.js

import Route from '@ember/routing/route';

class student {
    name = null;
    gender = null;
    class = null;
    grade = null;
    constructor(name, gender, class, grade) {
        this.name = name;
        this.gender = gender;
        this.class = class;
        this.grade = grade
    }

    show_grade() {
        return `I am ${this.name} of 
        Class ${this.class} Get ${this.grade}`;
    }
}

export default class StudentsRoute
    extends Route {
    students = 
    [new student('Aakash', 'M', 10, 'A',),
    new student('Soniya', 'F', 8, 'C'),
    new student('Esnoor', 'M', 9, 'C'),
    new student('Isha', 'F', 11, 'B',),
    new student('Doman', 'M', 12, 'B'),
    new student('Lolu', 'M', 10, 'A'),
    new student('Satyam', 'M', 10, 'A'),
    ];
    temp2;
    temp;
    model() {
        return this.students;
    }
    setupController(controller, model) {
        super.setupController(controller, model);
        controller.set('students', this.students);
        controller.set('temp', this.temp);
        controller.set('temp1', this.temp1);
        controller.set('temp2', this.temp2);
    }
}

app/controllers/isEvery1.js

import Ember from 'ember';
import { mapBy } from '@ember/array';

export default Ember.Controller.extend({
    actions: {
        Every_Pass() {
            let ans = 
            this.students.isEvery('grade', 'F');
            ans ? alert(`All Student Doesn't pass in Exam`) : 
            alert('All Student pass in Exam');
        },
        Every_Female() {
            let ans = 
            this.students.isEvery('gender', 'F');
            ans ? alert(`All Student are Female`) : 
            alert('All Student are not Female');
        },
        Every_male() {
            let ans = 
            this.students.isEvery('gender', 'M');
            ans ? alert(`All Student are male`) : 
            alert('All Student are not Male');
        },

    },
});

app/templates/isEvery1.hbs

{ { page - title "Student" } }
<h3>List of Students: </h3>
<br /><br />
<table>
    <tr>
        <th>Name</th>
        <th>Gender </th>
        <th>Class </th>
        <th>Grade </th>
    </tr>
    {{#each @model as |detail|}}
    <tr>
        <td>{{detail.name}}</td>
        <td> {{detail.gender}}</td>
        <td>{{detail.class}}</td>
        <td>{{detail.grade}}</td>
    </tr>
    {{/each}}
</table>

<br/>
<br/>
<div>
    <input type="button"
           id="check-pass" 
           value="Is Every One Pass" 
           {{action 'Every_Pass' }} />
</div>
<br/>
<div>
    <input type="button"
           id="check-female" 
           value="Is All Student Female" 
           {{action 'Every_Female' }} />
</div>
<br/>
<div>
    <input type="button"
           id="check-male" 
           value="Is All Student male" 
           {{action 'Every_male' }} />
</div>
{ { outlet } }

Output: Visit localhost:4200/isEvery1 to view the output

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

ember generate route isEvery2

app/routes/isEvery2.js

import Route from '@ember/routing/route';
import { } from '@ember/array';

export default class FruitsRoute
    extends Route {
    item1 = [
        {
            name: 'Apple',
            isFruit: true,
            color: 'red',
        },
        {
            name: 'Grapes',
            isFruit: true,
            color: 'green',
        },
        {
            name: 'Mango',
            isFruit: true,
            color: 'yellow',
        },
        {
            name: 'Watermelon',
            isFruit: true,
            color: 'red',
        },
        {
            name: 'Orange',
            isFruit: true,
            color: 'orange',
        },
        {
            name: 'Lady Finger',
            isFruit: false,
            color: 'green',
        },
        {
            name: 'Brinjal',
            isFruit: false,
            color: 'purple',
        },
        {
            name: 'Potato',
            isFruit: false,
            color: 'brown',
        },
        {
            name: 'Onion',
            isFruit: false,
            color: 'violet',
        },
    ];
    model() {
        return this.item1;
    }
    setupController(controller, model) {
        super.setupController(controller, model);
        controller.set('item1', this.item1);
    }
}

app/controllers/isEvery2.js

import Ember from 'ember';
import { removeAt, unshiftObjects, objectAt,
        uniqBy, find } from '@ember/array';

export default Ember.Controller.extend({
    actions: {
        removeDetails(start, end) {
            this.item1.removeAt(start, end);
        },
        All_fruit() {
            let foo = 
            this.item1.isEvery('isFruit');
            foo ? alert(`Yes all Item are Fruit`)
            : alert(`There is some other items`)
        },
        Any_Vegy() {
            let foo = 
            this.item1.isAny('isFruit', false);
            foo ? alert(`Yes It contains Vegetable also`)
            : alert(`There is No Vegetable in list`)
        },
    },
});

app/templates/isEvery2.hbs

{{page-title "Fruits"}}
<table style=" border-spacing : 30px">
<h3>Here is a list 1: </h3>
<ul>
    {{#each @model as |eatable|}}
    <li>{{eatable.name}}</li>
    {{/each}}
</ul>
</table>
<div>
    <label>Enter Start Index: </label>
    {{input value=this.start}}
</div>
<div>
    <label>Enter End Index: </label>
    {{input value=this.end}}
</div>
<div>
    <input type="button" id="remove-details"
        value="Remove Details"
        {{action 'removeDetails'
        this.start this.end}} />
</div>
<br /><br />
<input type="button" id="all-Fruit"
    value="All item are Fruits"
    {{action 'All_fruit' }} />

<br /><br />
<input type="button" id="any-vegy"
    value="Any item are Vegetables"
    {{action 'Any_Vegy' }} />

{{outlet}}