Ember.js ArrayProxy setEach() 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 setEach() method is used to set the value of the named property of each element in the array.
Syntax:
setEach( key, value );
Parameters:
- key: It is the name of key whose value we want to set.
- value: It is the value to set for the key.
Return Value: A receiver.
Steps to Install and Run Ember.js:
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 setEach1
app/routes/setEach1.js
import Route from '@ember/routing/route' ; export default class FruitsRoute extends Route { fruits = [ { 'name' : 'Lady Finger' , 'isFruit' : false , 'color' : 'green' , 'quant' : 2, }, { 'name' : 'Brinjal' , 'isFruit' : false , 'color' : 'purple' , 'quant' : 2, }, { 'name' : 'Apple' , 'isFruit' : true , 'color' : 'red' , 'quant' : 5, }, { 'name' : 'Grapes' , 'isFruit' : true , 'color' : 'green' , 'quant' : 4, }, { 'name' : 'Mango' , 'isFruit' : true , 'color' : 'yellow' , 'quant' : 3, }, { 'name' : 'Watermelon' , 'isFruit' : true , 'color' : 'red' , 'quant' : 2, }, { 'name' : 'Orange' , 'isFruit' : true , 'color' : 'orange' , 'quant' : 2, }, { 'name' : 'Banana' , 'isFruit' : true , 'color' : 'yellow' , 'quant' : 5, }, { 'name' : 'Papaya' , 'isFruit' : true , 'color' : 'orange' , 'quant' : 5, }, ]; item2; item3; model() { return this .fruits; } setupController(controller, model) { super .setupController(controller, model); controller.set( 'fruits' , this .fruits); controller.set( 'item1' , this .item1); controller.set( 'item2' , this .item2); controller.set( 'item3' , this .item3); } } |
app/controllers/setEach1.js
import Ember from "ember" ; export default Ember.Controller.extend({ actions: { show_Fruits() { let temp = this .fruits.rejectBy( 'isFruit' , false ); let foo = temp.mapBy( 'name' ); alert(foo.join( '\n' )) }, slice_items(idx1, idx2) { let foo = this .fruits.slice(idx1, idx2); let ans = foo.mapBy( 'name' ) alert(ans.join( '\n' )) }, remove() { this .fruits.shiftObject(); }, set_quant(data) { this .fruits.setEach( 'quant' , data); }, select() { let temp = this .fruits.uniqBy( 'color' ); let ans = temp.mapBy( 'name' ); alert(ans.join( '\n' )); } }, }); |
app/templates/setEach1.hbs
{{page-title "setEach" }} <h3>Here is a list of eatables: </h3> <table> <tr> <th>Name</th> <th>Fruit</th> <th>Color</th> <th>Quantity</th> </tr> {{ #each @model as |detail|}} <tr> <td>{{detail.name}}</td> <td>{{detail.isFruit}}</td> <td>{{detail.color}}</td> <td>{{detail.quant}}</td> </tr> {{/each}} </table> <br /><br /> <div> <label>Enter first index: </label> {{input value= this .temp}} </div> <div> <label>Enter last indexs: </label> {{input value= this .temp2}} </div> <input type= "button" id= "check-atIndex" value= "Slice list" {{action "slice_items" this .temp this .temp2}} /> <br /> <br /> <div> <label>Enter Quantity: </label> {{input value= this .temp3}} </div> <input type= "button" id= "set-quant" value= "Set Each Quantity" {{action "set_quant" this .temp3}} /> <br /><br /> <div> <input type= "button" id= "removeFruit" value= "Remove 1's Fruit" {{action "remove" }} /> </div> <br /> <div> <input type= "button" id= "addFruit" value= "Show Fruit" {{action "show_Fruits" }} /> </div> <br /> <input type= "button" id= "select-fruits" value= "Select One item of Each color" {{action "select" }} /> {{outlet}} |
Output: Visit localhost:4200/setEach1 to view the output
Example 2: Type the following code to generate the route for this example:
ember generate route setEach2
app/routes/setEach2.js
import Route from "@ember/routing/route" ; export default class StudentsRoute extends Route { students = [ { name: "Aaush Somankar" , gender: "M" , class: 12, grade: "A" , mobile: 7897391833, }, { name: "Aman Prakash" , gender: "M" , class: 10, grade: "A" , mobile: 8293839918, }, { name: "Siya guru" , gender: "F" , class: 11, grade: "B" , mobile: 6293839912, }, { name: "Ramesh verma" , gender: "M" , class: 10, grade: "A" , mobile: 7193839932, }, { name: "Esnoor" , gender: "M" , class: 9, grade: "F" , mobile: 8372819383, }, { name: "Balit" , gender: "M" , class: 10, grade: "A" , mobile: 7361927365, }, { name: "Dora" , gender: "F" , class: 12, grade: "F" , mobile: 5634152617, }, { name: "Lalu" , gender: "F" , class: 8, grade: "A" , mobile: 8372618392, }, { name: "Pokhraj" , gender: "M" , class: 11, grade: "F" , mobile: 9302810231, }, { name: "Rahul" , gender: "M" , class: 9, grade: "A" , mobile: 7837919373, }, { name: "Ram" , gender: "M" , class: 12, grade: "A" , mobile: 8272112539, }, { name: "Priti" , gender: "F" , class: 9, grade: "F" , mobile: 8836172912, }, { name: "Sita" , gender: "F" , class: 8, grade: "A" , mobile: 9193830293, }, ]; convert(string) { this .item = string.split( "," ).map((item) => item.trim()); return this .item; } model() { return this .students; } setupController(controller, model) { super .setupController(controller, model); controller.set( "students" , this .students); controller.set( "convert" , this .convert); controller.set( "item" , this .item); } } |
app/controllers/setEach2.js
import Ember from "ember" ; export default Ember.Controller.extend({ actions: { select() { let temp = this .students.uniqBy( 'class' ); let ans = temp.mapBy( 'name' ) alert(ans.join( '\n' )) }, hide() { this .students.setEach( 'mobile' , '**********' ) }, allPass() { let tempItems = this .students.rejectBy( 'grade' , 'F' ); let ans = tempItems.mapBy( 'name' ) alert(ans.join( '\n' )) }, remove() { this .students.shiftObject(); }, check_item(idx) { let temp = this .students .objectAt(JSON.parse(idx)); alert(temp.name) }, check_items(idx1, idx2) { let temp = this .students.slice(idx1, idx2); let ans = temp.mapBy( 'name' ) alert(ans.join( '\n' )) }, }, }); |
app/templates/setEach2.hbs
{{page-title "setEach" }} <h3>List of Students: </h3> <table> <tr> <th>Name</th> <th>Class</th> <th>Gender</th> <th>Grade</th> <th>Mobile No.</th> </tr> {{ #each @model as |student|}} <tr> <td>{{student.name}}</td> <td>{{student.class}}</td> <td>{{student.gender}}</td> <td>{{student.grade}}</td> <td>{{student.mobile}}</td> </tr> {{/each}} </table> <br /><br /> <div> <label>Enter first index: </label> {{input value= this .temp}} </div> <div> <label>Enter last indexs: </label> {{input value= this .temp2}} </div> <input type= "button" id= "check-atIndex" value= "Slice list" {{action "check_items" this .temp this .temp2}} /> <br /><br /> <input type= "button" id= "remove-last" value= "Remove First Student" {{action "remove" }} /> <br /><br /> <input type= "button" id= "hide-number" value= "Hide Mobile Numbers" {{action "hide" }} /> <br /><br /> <input type= "button" id= "all-pass" value= "Show All Passed Stuedents" {{action "allPass" }} /> <br /><br /> <input type= "button" id= "select-student" value= "Select One Student Of Each class" {{action "select" }} /> {{outlet}} |
Output: Visit localhost:4200/setEach2 to view the output
Reference: https://api.emberjs.com/ember/2.14/classes/Ember.Array/methods/setEach?anchor=setEach
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