Ember.js ArrayProxy reverseObjects() 方法

Ember.js 是一个开源的 JavaScript 框架，用于开发基于模型-视图-控制器（MVC）架构的大型客户端 Web 应用程序。Ember.js 是最常用的前端应用程序框架之一。它旨在加快开发速度并提高生产力。目前，它被许多网站使用，包括 Square、Discourse、Groupon、Linked In、Live Nation、Twitch 和 Chipotle。

reverseObjects() 方法用于反转数组中的对象。

语法:

reverseObjects( );

参数： 不需要任何参数。

返回值： EmberArray 接收器。

安装和运行 Ember.js 的步骤：

步骤1： 要运行以下示例，您需要有一个 Ember 项目。要创建一个项目，您首先需要安装 ember-cli。在终端中输入以下代码：

npm install ember-cli

步骤2： 现在，您可以通过键入以下代码来创建项目：

ember new <project-name> --lang en

要启动服务器，请键入：

ember serve

示例1: 输入以下代码以生成此示例的路由：

ember generate route reverseObject1

app/routes/reverseObject1.js

import Route from '@ember/routing/route';
 
export default class PartyRoute extends Route {
    partyItems = [
        'Oxygen',
        'Tenet',
        'Source Code',
        'Infine',
        'Loopert',
        'Tenet',
        'SpiderHead',
        'The Thing',
        'A Quiet Place',
        'The Invisible Man',
        'Looper',
        'The Thing',
        'Ad Astra'
    ];
    temp = [
        'Shutter Island',
        'Matrix',
        'Avatar',
        'Fantastic Beast',
        'Avengers',
        'Fantastic four',
        'HulK',
        '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);
    }
}

app/controllers/reverseObject1.js

import Ember from 'ember';
import { reverseObjects, unshiftObject, unique, }
    from '@ember/array';
 
export default Ember.Controller.extend({
    actions: {
        invert() {
            this.partyItems.reverseObjects( );
             
        },
        insert_first(data) {
            this.partyItems.unshiftObject(data);
        },
        remove_d() {
            let res = this.partyItems.unique();
            this.partyItems.setObjects(res)
        },
    },
});

app/templates/reverseObject1.hbs

{{page-title "reverseObjecets"}}
<h3>Here is a list of items: </h3>
<ul>
    {{#each @model as |party|}}
        <li>{{party}}</li>
      {{/each}}
</ul>
<br /><br />
<div>
    <label>Enter Item: </label>
      {{input value=this.item}}
</div>
<div>
    <input
        type="button"
        id="insert-beginning"
        value="Insert at Beginning"
        {{action "insert_first" this.item}}
      />
</div>
<br />
<input
    type="button"
      id="reverse_list"
      value="Reverse List"
      {{action "invert"}}
/>
<br /><br />
<input
    type="button"
      id="remove-duplicates"
      value="Remove duplicates"
      {{action "remove_d"}}
/>
{{outlet}}

输出: 访问 localhost:4200/reverseObject1 查看输出结果

Ember.js ArrayProxy reverseObjects() 方法

示例2: 输入以下代码以生成此示例的路由：

ember generate route reverseObject2

import Route from '@ember/routing/route';
 
export default class ListRoute extends Route {
    list = [
    "Digital Camera",
    "Speakers",
    "Balloons",
    "Scissors",
    "Cups",
    "Table Confetti",
    "Scissors",
    "Wine",
    "Napkins",
    "Party Plates",
    "Speakers",
    "Music System",
    "Cups",];
    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);
    }
}

app/controllers/reverseObject2.js

import Ember from 'ember';
import { reverseObjects, uniq, setObjects, unshiftObject }
    from '@ember/array';
 
export default Ember.Controller.extend({
    actions: {
        reverse() {
            this.list.setObjects(this.list.reverseObjects());
        },
        remove_d() {
            let k = this.list.uniq();    
            this.list.setObjects(k);
        },    
        add_first(item) {
            this.list.unshiftObject(item);
        },
    },
});

app/templates/reverseObject2.hbs

{{page-title "reverseObjects"}}
<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.item}}
</div>
<div>
    <input
        type="button"
        id="insert-item"
        value="Insert at Beginning"
        {{action "add_first" this.item}}
      />
</div>
<br />
<input
    type="button"
      id="remove-duplicates"
      value="Remove duplicates"
      {{action "remove_d"}}
/>
<br /><br />
<input
    type="button"
      id="reverse_list"
      value="Reverse List"
      {{action "reverse"}}
/>
{{outlet}}