Ember.js ArrayProxy reduce() Method

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

export default class PartyRoute extends Route {
    partyItems = [
        'Oxygen',
        'Source Code',
        'Infine',
        'Tenet',
        'SpiderHead',
        'The Thing',
        'A Quiet Place',
        'The Invisible Man',
        'Looper',
        'Ad Astra'
    ];
  temp = [
        'Shutter Island',
        'Matrix',
        'Avatar',
        'Fantastic Beast',
        'Avengers',
        'Fantastic four',
        'Hult',
        'Superman',
        'Spiderman',
        'The Batman'
    ];
    item;
    idx;
    model() {
        return this.partyItems;
    }
    setupController(controller, model) {
        super.setupController(controller, model);
        controller.set('partyItems', this.partyItems);
        controller.set('item', this.item);
        controller.set('idx', this.idx);
    controller.set('temp', this.temp);
    }
}

import Ember from 'ember';
import { pushObject, reduce, reject, removeAt, removeObject, pushObjects } 
from '@ember/array';

export default Ember.Controller.extend({
    actions: {
        insertItem(item) {
            this.partyItems.pushObject(item);
        },
        push_item(data) {
            this.partyItems.pushObjects(data);
        },
        print_item() {
            let ans = this.partyItems.reduce((acc, curr) => 
            acc += '\n' + curr);
            alert(ans)
        },
        searchItem(data) {
            let ans = this.partyItems.reject((movie) =>
            movie.slice(0, 1) != data);
            alert(ans.join('\n'))
        },
        removeItem(data) {
            this.partyItems.removeObject(data);

        },
        removeItemAt(data) {
            this.partyItems.removeAt(JSON.parse(data));
        },
    },
});

{{page-title "reduce"}}
<h3>Here is a list of items: </h3>
<ul>
    {{#each @model as |party|}}
        <li>{{party}}</li>
    {{/each}}
</ul>
<br />
<div>
    <label>Enter character: </label>
    {{input value=this.item}}
</div>
<div>
    <input
        type="button"
        id="search-item"
        value="Seach Movie Name Start with latter"
        {{action "searchItem" this.item}}
    />
</div>
<br />
<div>
    <label>Enter Index: </label>
    {{input value=this.item4}}
</div>
<div>
    <input
        type="button"
        id="remove-item-At"
        value="Remove Movie At index"
        {{action "removeItemAt" this.item4}}
    />
</div>
<br />
<div>
    <label>Enter Item: </label>
    {{input value=this.item3}}
</div>
<div>
    <input
        type="button"
        id="remove-item"
        value="Remove Movie"
        {{action "removeItem" this.item3}}
    />
</div>
<br />
<div>
    <label>Enter Item: </label>
    {{input value=this.item2}}
</div>
<div>
    <input
        type="button"
        id="insert-item"
        value="Insert Item"
        {{action "insertItem" this.item2}}
    />
</div>
<br />
<input
    type="button"
    id="contains-item"
    value="Add Movies"
    {{action "push_item" this.temp}}
/>
<br /><br />
<input
    type="button"
    id="show-item"
    value="List All Movies"
    {{action "print_item"}}
/>
{{outlet}}

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

export default class ListRoute extends Route {
    list = [1, 2, 3, 5, 6, 7, 8, 9];
    list1 = [21, 24, 12, 22, 26, 12];
    item;
    idx;
    model() {
        return this.list;
    }
    setupController(controller, model) {
        super.setupController(controller, model);
        controller.set('list', this.list);
        controller.set('item', this.item);
        controller.set('idx', this.idx);
        controller.set('list1', this.list1);
    }
}

import Ember from 'ember';
import { pushObject, pushObjects , reduce, reject, 
removeAt, removeObject }
    from '@ember/array';

export default Ember.Controller.extend({
    actions: {
        insertItem(item) {
            this.list.pushObject( JSON.parse(item));
        },
        insertItems() {
            this.list.pushObjects( this.list1);
        },
        sumItems() {
            let ans = this.list.reduce((acc, curr)=>
            acc+=curr);
            alert(ans)
        },
        printItems() {
            let ans = this.list.reject((numb)=> 
            numb%2!=1);
            alert(ans.join('\n'))
        },
        removeItem(data) {
            this.list.removeAt(JSON.parse(data));
            
        },
        removeObject(data) {
            this.list.removeObject(JSON.parse(data));
            
        },
    },
});

{{page-title "reduce"}}
<h3>Here is a list of Items: </h3>
<ul>
    {{#each @model as |i|}}
        <li>{{i}}</li>
    {{/each}}
</ul>
<br />
<div>
    <label>Enter Item: </label>
    {{input value=this.item3}}
</div>
<div>
    <input
        type="button"
        id="insert-item"
        value="Insert Item"
        {{action "insertItem" this.item3}}
    />
</div>
<br />
<div>
    <label>Enter Item: </label>
    {{input value=this.item2}}
</div>
<div>
    <input
        type="button"
        id="remove-Object"
        value="Remove Item"
        {{action "removeObject" this.item2}}
    />
</div>
<br />
<div>
    <label>Enter Index: </label>
    {{input value=this.item}}
</div>
<div>
    <input
        type="button"
        id="remove-item"
        value="Remove Item at Index"
        {{action "removeItem" this.item}}
    />
</div>
<br />
<div>
    <input
        type="button"
        id="print-item"
        value="Print Event Numbers"
        {{action "printItems"}}
    />
</div><br />
<div>
    <input
        type="button"
        id="push-items"
        value="Insert more items"
        {{action "insertItems"}}
    />
</div>
<br />
<div>
    <input
        type="button"
        id="sum-item"
        value="Total sum"
        {{action "sumItems"}}
    />
</div>
{{outlet}}