Ember.js EmberArray reject() 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 reject() method is used to get all the false values to test the function. This method is the inverse of the filter.

Syntax:

reject( callback, target );

Parameters:

callback: It is the callback that will execute on each function.
target: It is the target item on which callback perform.

Return Value: A rejected Array.

Steps to Install and Rub Ember.js Code:

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 reject1

app/routes/reject1.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); 
        controller.set('item2', this.item2); 
    } 
}

app/controllers/reject1.js

import Ember from 'ember'; 
import { pushObjects, isAny } from '@ember/array'; 
  
export default Ember.Controller.extend({ 
    actions: { 
        Check_item(data, data1) { 
            data1 = (data == 'isFruit') ?  
            JSON.parse(data1) : data1; 
            let ans = this.item1.reject((item ) 
            => item[data] == data1); 
            let temp = ''; 
            for(let i = 0; i< ans.length ; i++) 
                temp += ans[i].name + '\n'; 
            ans ? alert(temp) 
                : alert(`It doesn't contains any Falsely value`) 
        }, 
    }, 
});

app/templates/reject1.hbs

{{page-title "Fruits"}} 
<table style=" border-spacing : 30px"> 
    <h3>Here is a Bucket: </h3> 
    <ul> 
        {{#each @model as |eatable|}} 
            <li>{{eatable.name}}</li> 
        {{/each}} 
    </ul> 
</table> 
<br /><br /> 
<div> 
    <label> 
        Enter Attribute: 
    </label> 
    {{input value=this.temp1}} 
</div> 
<div> 
    <label> 
        Enter value for falsely match: 
    </label> 
    {{input value=this.temp2}} 
</div> 
<br /> 
<input 
    type="button"
    id="fruit-all"
    value="List Contains Any Fruit?"
    {{action "Check_item" this.temp1  
    this.temp2}} 
/> 
  
{{outlet}}

Output: Visit localhost:4200/reject1 to view the output

Ember.js EmberArray reject method

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

ember generate route reject2

app/routes/reject2.js

import Route from '@ember/routing/route'; 
  
export default class DetailsRoute 
    extends Route { 
    details = [ 
        { 
            name: 'Aaksh', 
            mobile: '9811129967', 
            city: 'Delhi', 
            country: 'India', 
            gender: 'M', 
            zipCode: '800020', 
        }, 
        { 
            name: 'Sweta', 
            mobile: '9456712890', 
            city: 'Mumbai', 
            country: 'India', 
            gender: 'F', 
            zipCode: '400001', 
        }, 
        { 
            name: 'Satyam', 
            mobile: '2222222222', 
            city: 'Raipur', 
            country: 'India', 
            gender: 'M', 
            zipCode: '110012', 
        }, 
        { 
            name: 'Shandya', 
            mobile: '1122113322', 
            city: 'Bangalore', 
            country: 'India', 
            gender: 'F', 
            zipCode: '530068', 
        }, 
        { 
            name: 'Ayushi', 
            mobile: '2244668800', 
            city: 'Thana', 
            country: 'India', 
            gender: 'F', 
            zipCode: '302001', 
        }, 
    ]; 
    someMoreDetails = [ 
        { 
            name: 'Yogesh', 
            mobile: '1133557799', 
            city: 'Chennai', 
            country: 'India', 
            gender: 'F', 
            zipCode: '600001', 
        }, 
        { 
            name: 'Sunny', 
            mobile: '9911000000', 
            city: 'Masore', 
            country: 'India', 
            gender: 'M', 
            zipCode: '574142', 
        }, 
        { 
            name: 'Khushi', 
            mobile: '8888888888', 
            city: 'Pune', 
            country: 'India', 
            gender: 'F', 
            zipCode: '111045', 
        }, 
    ]; 
    city; 
    name; 
    code; 
    model() { 
        return this.details; 
    } 
    setupController(controller, model) { 
        super.setupController(controller, model); 
        controller.set('details', this.details); 
        controller.set('someMoreDetails', 
            this.someMoreDetails); 
        controller.set('city', this.city); 
        controller.set('code', this.code); 
        controller.set('name', this.name); 
    } 
}

app/controllers/reject2.js

import Ember from 'ember'; 
import { addObjects, shiftObject, setEach } 
    from '@ember/array'; 
  
export default Ember.Controller.extend({ 
    actions: { 
        checkCity(city) { 
            let foo =  this.details.reject((person) 
            => person.city == this.city); 
            let temp = ''; 
            for(let i = 0; i< foo.length ; i++) 
                temp += foo[i].name +" from " +   
                foo[i].city + '\n'; 
            foo ? alert(`${temp}`) :  
            alert(`No falsely value present of city ${city}`); 
        }, 
        checkName(name) { 
            let foo =  this.details.reject((person) 
            => person.name == this.name ); 
            let temp = ''; 
            for(let i = 0; i< foo.length ; i++) 
                temp += foo[i].name + "  
                from " + foo[i].city + '\n'; 
            foo ? alert(`${temp} `)  
            : alert(`No one of ${name}`); 
        }, 
        checkCode(code) { 
            let foo =  this.details.reject((person) 
            => person.zipCode == this.code ); 
            let temp = ''; 
            for(let i = 0; i< foo.length ; i++) 
                temp += foo[i].name + " from " +  
                foo[i].zipCode + '\n'; 
            foo ? alert(`${temp} `) 
            : alert(`No one of ${cod}`); 
        }, 
    }, 
});

app/templates/reject2.hbs

{{page-title "Details"}} 
<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 /><br /> 
<div> 
    <label>Enter City: </label> 
    {{input value=this.city}} 
</div> 
<div> 
    <input type="button" id="check-city" 
        value="Check Someone outside City" 
        {{action 'checkCity' this.city}} /> 
</div> 
<br /><br /> 
<div> 
    <label>Enter zipCode: </label> 
    {{input value=this.code}} 
</div> 
<div> 
    <input type="button"
        id="check-code" 
        value="Check Someone not  
        match Zip-Code" 
        {{action 'checkCode' this.code}} /> 
</div><br /><br /> 
<div> 
    <label>Enter Name: </label> 
    {{input value=this.name}} 
</div> 
<div> 
    <input type="button" id="check-name" 
        value="Check Someone whose name  
        is not Name" 
        {{action 'checkName' this.name}} /> 
</div> 
{{outlet}}