Ember.js MutableArray sortBy()方法

Ember.js 是一款基于模型-视图-控制器（MVC）架构用于开发大型客户端 Web 应用程序的开源 JavaScript 框架。Ember.js 是最广泛使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、领英、现场国家、Twitch和Chipotle。

sortBy() 方法用于按指定键对数组进行排序。

语法：

sortBy( key )

参数:

name(string): 要排序的名称。

返回值: 排序后的数组。

要运行以下示例，您需要有一个ember项目。要创建一个项目，您需要首先安装ember-cli。在终端中写入以下代码:

npm install ember-cli

现在，您可以通过输入以下一段代码来创建项目:

ember new <project-name> --lang en

开始服务器，输入：

ember serve

示例1

键入以下代码以生成此示例的路由：

ember generate route languages

app/routes/languages.js

import Route from '@ember/routing/route'; 
import { classify, w } from '@ember/string'; 
import { pushObject, sortBy } from '@ember/array'; 
  
export default class LanguagesRoute extends Route { 
    name = 
        `mandarin_Chinese spanish english Hindi  
        bengali Portuguese russian japanese  
        western_punjabi yueChinese`; 
    num = `929.0 474.7 372.9 343.9 233.7  
        232.4 154.0 125.3 92.7 85.2`; 
  
    languages = []; 
      
    initLanguages() { 
        this.languages = []; 
        this.name = w(this.name); 
        this.num = w(this.num); 
        for (let i = 0; i < this.name.length; i++) { 
            let obj = new Object(); 
            obj['name'] = classify(this.name[i]); 
            obj['num'] = this.num[i]; 
            this.languages.pushObject(obj); 
        } 
    } 
      
    model() { 
        this.initLanguages(); 
        this.languages = this.languages.sortBy('name'); 
        return this.languages; 
    } 
}

app/template/languages.js

{{page-title "Languages"}} 
  
<h2>Most Spoken Languages in the World</h2> 
  
<table style="border: 2px solid black;padding: 30px;"> 
    <tr> 
        <th>Language</th> 
        <th>Native Speakers (millions)</th> 
    </tr> 
    {{#each @model as |language|}} 
    <tr> 
        <td>{{language.name}}</td> 
        <td>{{language.num}}</td> 
    </tr> 
    {{/each}} 
</table> 
  
{{outlet}}

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

Ember.js MutableArray sortBy()方法

示例2

输入以下代码以生成此示例的路由：

ember generate route richest-people

app/routes/richest-people.js

import Route from '@ember/routing/route'; 
import { sortBy } from '@ember/array'; 
  
export default class RichestPeopleRoute extends Route { 
    richestPeople = [ 
        { 'name': 'mukesh ambani', 'net-worth': 90.7 }, 
        { 'name': 'jeff Bezos', 'net-worth': 148.1 }, 
        { 'name': 'Warren Buffet', 'net-worth': 99.3 }, 
        { 'name': 'Bill gates', 'net-worth': 104.7 }, 
        { 'name': 'elon Musk', 'net-worth': 253.4 }, 
        { 'name': 'gautam adani and family', 'net-worth': 115.8 }, 
        { 'name': 'Larry Page', 'net-worth': 93.4 }, 
        { 'name': 'larryEllison', 'net-worth': 103.3 }, 
        { 'name': 'sergeyBrin', 'net-worth': 89.9 }, 
        { 'name': 'bernard Arnault and family', 'net-worth': 157.1 }, 
    ]; 
    model() { 
        this.richestPeople = this.richestPeople.sortBy('net-worth'); 
        return this.richestPeople; 
    } 
}

app/template/richest-people.hbs

{{page-title "Richest People"}} 
  
<h2>Top 10 Richest Person in the World</h2> 
  
<table style="border: 2px solid black;padding: 30px;"> 
    <tr> 
        <th>Name</th> 
        <th>Net Worth (in Billion Dollars)</th> 
    </tr> 
    {{#each @model as |person|}} 
    <tr> 
        <td>{{person.name}}</td> 
        <td>{{person.net-worth}}</td> 
    </tr> 
    {{/each}} 
</table> 
  
{{outlet}}