Ember.js ArrayProxy find() Method

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 find() method is used to get the first item which returns true against the callback function.

Syntax:

find ( callback, target );

Parameters:

• callback: It is the callback function that checks for the item in the list.
• target: It is the item on which we test the callback function.

Return Value: Found item or undefined.

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 find1

app/routes/find1.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',
        },
    ];
    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/find1.js

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

export default Ember.Controller.extend({
    actions: {
        findCity(city) {
            let foo = this.details.find((person) =>
            person.city == this.city);
            foo ? alert(`${foo.name}  is from ${city} `) :
            alert(`No one from ${city}`);
        },
        findName(name) {
            let foo = this.details.find((person) =>
            person.name == this.name);
            foo ? alert(`${name}  is from ${foo.city} `) :
            alert(`No By name ${name}`);
        },
        findCode(code) {
            let foo = this.details.find((person) =>
            person.zipCode == this.code);
            foo ? alert(`${foo.name}  is from ${code} `) :
            alert(`No one from ${code}`);
        },
    },
});

app/templates/find1.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="find-city"
        value="Find Someone By City"
        {{action "findCity" this.city}}
      />
</div>
<br /><br />
<div>
    <label>Enter Name: </label>
      {{input value=this.name}}
</div>
<div>
    <input
        type="button"
        id="find-name"
        value="Find Someone by Name"
        {{action "findName" this.name}}
      />
</div>
<br /><br />
<div>
    <label>Enter Zip: </label>
      {{input value=this.code}}
</div>
<div>
    <input
        type="button"
        id="find-code"
        value="Find Someone By zipCode"
        {{action "findCode" this.code}}
      />
</div>
{{outlet}}

Output: Visit localhost:4200/find1 to view the output

Ember.js ArrayProxy find method

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

ember generate route find2

app/routes/find2.js

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

export default class StudentsRoute extends Route {
    students = [
        {
            name: 'Aakash',
            gender: 'M',
            class: 10,
            grade: 'A',
        },
        {
            name: 'Soniya',
            gender: 'F',
            class: 8,
            grade: 'C',
        },
        {
            name: 'Sita',
            gender: 'F',
            class: 10,
            grade: 'A',
        },
        {
            name: 'Ram',
            gender: 'M',
            class: 10,
            grade: 'A',
        },
        {
            name: 'Esnoor',
            gender: 'M',
            class: 9,
            grade: 'C',
        },
        {
            name: 'Isha',
            gender: 'F',
            class: 19,
            grade: 'B',
        },
        {
            name: 'Doman',
            gender: 'M',
            class: 12,
            grade: 'B',
        },
        {
            name: 'Lolu',
            gender: 'M',
            class: 10,
            grade: 'A',
        },
        {
            name: 'Lucky',
            gender: 'M',
            class: 11,
            grade: 'F',
        },
        {
            name: 'Neha',
            gender: 'F',
            class: 10,
            grade: 'B',
        },
        {
            name: 'Balit',
            gender: 'M',
            class: 12,
            grade: 'F',
        },
        {
            name: 'Hillier Buchanan',
            gender: 'M',
            class: 12,
            grade: 'A',
        },
        {
            name: 'Aman',
            gender: 'M',
            class: 11,
            grade: 'B',
        },
        {
            name: 'Anuj',
            gender: 'M',
            class: 12,
            grade: 'F',
        },
        {
            name: 'Satyam',
            gender: 'M',
            class: 12,
            grade: 'F',
        },
        {
            name: 'Aayush',
            gender: 'M',
            class: 12,
            grade: 'C',
        },
    ];
    temp2;
    model() {
        return this.students;
    }
    setupController(controller, model) {
        super.setupController(controller, model);
        controller.set('students', this.students);
        controller.set('temp2', this.temp2);
    }
}

app/controllers/find2.js

import Ember from "ember";
import { map, clear } from "@ember/array";

export default Ember.Controller.extend({
    actions: {

        findName(name) {
            let temp = this.students.find((item) =>
            item.name == name);
            alert(temp ? `${name} is from ${temp.class} Class
            ` : `No one by name ${name}`);
        },
        findClass(clas) {
            let temp = this.students.find((item) =>
            item.class == clas);
            alert(temp ? `${temp.name} is first Student
            from ${clas}` : `No one from class ${clas}`);
        },
        Remove() {
            this.students.clear();

        },
    }
});

app/templates/find2.hbs

{{page-title "Students"}}
<h3>List of Students: </h3>
<br /><br />
<table>
    <tr>
        <th>Name</th>
        <th>Class</th>
        <th>Gender</th>
        <th>Grade</th>
      </tr>
      {{#each @model as |student|}}
    <tr>
          <td>{{student.name}}</td>
          <td>{{student.class}}</td>
          <td>{{student.gender}}</td>
          <td>{{student.grade}}</td>
    </tr>
      {{/each}}
</table>
<br /><br />
<div>
    <label>Enter Class: </label>
      {{input value=this.temp}}
</div>
<br />
<input
    type="button"
      id="find-class"
      value="Find First student of class"
      {{action "findClass" this.temp}}
/>
<br /><br />
<div>
    <label>Enter Name: </label>
      {{input value=this.temp2}}
</div>
<br />
<input
    type="button"
      id="find-name"
      value="Find Person"
      {{action "findName" this.temp2}}
/>
<br /><br />
<input
    type="button"
      id="Remove"
      value="Delate ALL"
      {{action "Remove" this.temp2}}
/>
{{outlet}}

Output: Visit localhost:4200/find2 to view the output

Ember.js ProxyArray find method

Reference: https://api.emberjs.com/ember/2.14/classes/Ember.Array/methods/find?anchor=find