Ember.js ArrayProxy uniq() 方法

Ember.js是一个基于Model-View-Controller（MVC）架构用于开发大型客户端Web应用的开源JavaScript框架。Ember.js是最广泛使用的前端应用框架之一。它旨在加快开发速度和提高生产力。目前，它被许多网站使用，包括Square，Discourse，Groupon，Linked In，Live Nation，Twitch和Chipotle。

uniq()方法用于获取唯一值的值数组。

语法：

uniq( );

参数: 它不接受任何参数。

返回值: EmberArray.

安装和运行Ember.js的步骤:

步骤1: 要运行下面的示例，您需要有一个Ember项目。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： 现在你可以通过输入以下代码片段来创建项目：

ember new <project-name> --lang en

启动服务器的方式如下：

ember serve

示例1

键入以下代码以生成此示例的路径：

ember generate route uniq1

app/routes/uniq1.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/uniq1.js

import Ember from 'ember'; 
import { reverseObjects, unshiftObject, uniq, } 
    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.uniq(); 
            this.partyItems.setObjects(res) 
        }, 
    }, 
});

app/templates/uniq1.hbs

{{page-title "uniq"}} 
<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-begining"
        value="Insert at Begining"
        {{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/uniq1 查看输出

Ember.js ArrayProxy uniq() 方法

示例2

键入以下代码生成路由

ember generate route uniq2

app/routes/uniq2.js

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/uniq2.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/uniq2.hbs

{{page-title "uniq"}} 
<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 Begining"
        {{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}}