{{ textarea args }}

npm install ember-cli

ember new <project-name> --lang en

ember serve

ember generate route text1

import Component from '@glimmer/component'; 
import { tracked } from '@glimmer/tracking'; 
import { action } from '@ember/object'; 
import { mapBy } from '@ember/object'; 
  
export default class extends Component { 
    student = [{ 
        "name": "Sam Snehil", 
        "age": 21 
    }, 
    { 
        "name": "Satyam Sahu", 
        "age": 23 
    }, 
    { 
        "name": "Sohan Argrwal", 
        "age": 25 
    }, 
    { 
        "name": "Sreya Sarma", 
        "age": 19 
    } 
        , 
    { 
        "name": "Satyam Sahu", 
    }]; 
  
    print(item) { 
        let ans = this.student.filterBy('name', item) 
        alert(JSON.stringify(ans)); 
    } 
}

{{yield}} 
<table> 
    <tr> 
        <th>Name</th> 
        <th>Age</th> 
    </tr> 
    {{#each this.student as |detail|}} 
  
    {{#unless detail.age}} 
    <tr> 
        <td>{{get detail 'name'}}</td> 
        <td>{{18}}</td> 
    </tr> 
    {{else}} 
    <tr> 
        <td>{{get detail 'name'}}</td> 
        <td>{{get detail 'age'}}</td> 
    </tr> 
    {{/unless}} 
    {{/each}} 
</table> 
<br /> 
{{textarea value=this.value}} 
<br /> 
<input type="button" id="set-code" 
    value="Introduce Student" 
    {{action 'print' (mut this.value)}} />

<Arr2> 
   <h1> 
       List of Student :  
   </h1> 
</Arr2> 
{{outlet}}

ember generate route unless2

import Component from '@glimmer/component'; 
import {tracked} from '@glimmer/tracking'; 
import { action, addObjects } from '@ember/object'; 
export default class CompactComponent extends Component { 
   items = ['Oxygen', 
       'Source Code', 
       'Infine', 
       'Tenet', 
       'SpiderHead', 
       'The Thing', 
       'A Quiet Place', 
       'The Invisible Man', 
       'Looper', 
       'Ad Astra',]; 
  
   @action 
   remove(data) { 
       this.items.removeObject(data); 
   } 
}

{{#unless @show}} 
  
This comoponent Don't Have block!!<br /> 
{{else}} 
<ul> 
    <h3>{{yield}} : </h3> 
    {{#each this.items as |party|}} 
    <li>{{party}}</li> 
    {{/each}} 
</ul> 
<br /> 
{{textarea value=this.value}} 
<br /> 
<input type="button" id="check-atIndex" 
    value="Remove" {{action "remove" this.value}} /> 
<br /><br /> 
{{/unless}}

<Arr @show={{true}}> 
    List of items 
</Arr> 
{{outlet}} 
<Arr/>