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Embeer.js EmberArray setEach()用法及代码示例


Ember.js 是一个开源 JavaScript 框架，用于开发基于 Model-View-Controller (MVC) 架构的大型客户端 Web 应用程序。 Ember.js是使用最广泛的前端应用框架之一。它的目的是加速开发并提高生产力。目前，它被大量网站使用，包括 Square、Discourse、Groupon、Linked In、Live Nation、Twitch 和 Chipotle。

setEach() 方法为每个成员设置指定属性的值。

用法:

setEach(key,value)

参数：

  • key (string):设定的关键。
  • value (object): 要设置的值。

返回：结果数组。

安装和运行 Ember.js 的步骤：

第 1 步：要运行以下示例，您需要有一个 ember 项目。要创建一个，您需要先安装ember-cli。在终端中写入以下代码：

npm install ember-cli

第 2 步：现在您可以通过输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：键入以下代码以生成本示例的路由：

ember generate route details

应用程序/路线/details.js


import Route from '@ember/routing/route'; 
  
export default class DetailsRoute extends Route { 
    details = [ 
        { 
            'name': 'Anubhav', 
            'mobile': '1298119967', 
            'city': 'Patna', 
            'country': 'India', 
            'gender': 'M', 
            'zipCode': '800020'
        }, 
        { 
            'name': 'Sakshi', 
            'mobile': '1234567890', 
            'city': 'Mumbai', 
            'country': 'India', 
            'gender': 'F', 
            'zipCode': '400001'
        }, 
        { 
            'name': 'Satyam', 
            'mobile': '2222222222', 
            'city': 'Delhi', 
            'country': 'India', 
            'gender': 'M', 
            'zipCode': '110012'
        }, 
        { 
            'name': 'Shivam', 
            'mobile': '1122113322', 
            'city': 'Bangalore', 
            'country': 'India', 
            'gender': 'M', 
            'zipCode': '530068'
        }, 
        { 
            'name': 'Ayushi', 
            'mobile': '2244668800', 
            'city': 'Jaipur', 
            'country': 'India', 
            'gender': 'F', 
            'zipCode': '302001'
        } 
    ]; 
    someMoreDetails = [ 
        { 
            'name': 'Yeshwant', 
            'mobile': '1133557799', 
            'city': 'Chennai', 
            'country': 'India', 
            'gender': 'M', 
            'zipCode': '600001'
        }, 
        { 
            'name': 'Siddhant', 
            'mobile': '9911000000', 
            'city': 'Mangalore', 
            'country': 'India', 
            'gender': 'M', 
            'zipCode': '574142'
        }, 
        { 
            'name': 'Khushi', 
            'mobile': '8888888888', 
            'city': 'Pune', 
            'country': 'India', 
            'gender': 'F', 
            'zipCode': '111045'
        } 
    ]; 
    city; 
    code; 
    model() { 
        return this.details; 
    } 
    setupController(controller, model) { 
        this._super(controller, model); 
        controller.set('details', this.details); 
        controller.set('someMoreDetails', this.someMoreDetails); 
        controller.set('city', this.city); 
        controller.set('code', this.code); 
    } 
}

应用程序/控制器/details.js


import Ember from 'ember'; 
import { pushObjects, shiftObject,  
    setEach } from '@ember/array'; 
  
export default Ember.Controller.extend({ 
    actions: { 
        checkCity(city) { 
            alert(`Contains Person from ${city}: 
            ${this.details.isAny('city', city)?'Yes':'No'}`); 
        }, 
        checkCountry() { 
            alert(`All are  
            ${this.details.isEvery( 
                'country', 'India')?'':'not'} Indian`); 
        }, 
        remove(){ 
            this.details.shiftObject(); 
        }, 
        setZipCode(code){ 
            this.details.setEach('zipCode', code); 
        }, 
        pushMoreDetails(){ 
            this.details.pushObjects(this.someMoreDetails); 
        } 
    }, 
});

应用程序/模板/details.hbs


{{page-title "Details"}} 
<h3>List of People: </h3> 
<br /><br /> 
<table> 
    <tr> 
        <th>Name</th> 
        <th>Gender</th> 
        <th>Mobile</th> 
        <th>City</th> 
        <th>Country</th> 
        <th>Zip Code</th> 
    </tr> 
    {{#each @model as |detail|}} 
    <tr> 
        <td>{{detail.name}}</td> 
        <td>{{detail.gender}}</td> 
        <td>{{detail.mobile}}</td> 
        <td>{{detail.city}}</td> 
        <td>{{detail.country}}</td> 
        <td>{{detail.zipCode}}</td> 
    </tr> 
    {{/each}} 
</table> 
  
<br /><br /> 
<div> 
    <label>Enter City: </label> 
    {{input value=this.city}} 
</div> 
<div> 
    <input type="button" id="check-city" value="Check City"
           {{action 'checkCity' this.city}} /> 
</div> 
<br /><br /> 
<div> 
    <label>Enter Code: </label> 
    {{input value=this.code}} 
</div> 
<div> 
    <input type="button" id="set-code" value="Set Zip Code" 
           {{action 'setZipCode' this.code}} /> 
</div> 
<br /><br /> 
<input type="button" id="remove-detail" value="Remove" 
       {{action 'remove' }} /> 
<br /><br /> 
<input type="button" id="push-details" value="Add More Details"
       {{action 'pushMoreDetails' }} /> 
<br /><br /> 
<input type="button" id="check-country" value="All Indian?"
       {{action 'checkCountry' }} /> 
{{outlet}}

输出：访问 localhost:4200/details 查看输出

示例 2：键入以下代码以生成本示例的路由：

ember generate route websites

应用程序/路线/websites.js


import Route from '@ember/routing/route'; 
  
export default class WebsitesRoute extends Route { 
    websites=[ 
        { 
            'name': 'Wikipedia', 
            'link': 'www.wikipedia.com'
        }, 
        { 
            'name': 'Facebook', 
            'link': 'www.facebook.com'
        }, 
        { 
            'name': 'Google', 
            'link': 'www.google.com'
        }, 
        { 
            'name': 'Twitter', 
            'link': 'www.twitter.com'
        } 
    ]; 
    moreWebsites = [ 
        { 
            'name': 'Instagram', 
            'link': 'www.instagram.com'
        }, 
        { 
            'name': 'Amazon', 
            'link': 'www.amazon.com'
        } 
    ] 
    model() { 
        return this.websites; 
    } 
    setupController(controller, model) { 
        this._super(controller, model); 
        controller.set('websites', this.websites); 
        controller.set('moreWebsites', this.moreWebsites); 
    } 
}

应用程序/控制器/websites.js


import Ember from 'ember'; 
import { pushObjects, setEach } from '@ember/array'; 
  
export default Ember.Controller.extend({ 
    actions: { 
        set(){ 
            this.websites.setEach('name', 'GeeksforGeeks'); 
            this.websites.setEach('link', 'www.geeksforgeeks.org'); 
        }, 
        add(){ 
            this.websites.pushObjects(this.moreWebsites); 
        } 
    }, 
});

应用程序/模板/websites.hbs


{{page-title "Websites"}} 
<h3>Websites</h3> 
<br /><br /> 
<table> 
    <tr> 
        <th>Name</th> 
        <th>Website Link</th> 
    </tr> 
    {{#each @model as |website|}} 
    <tr> 
        <td>{{website.name}}</td> 
        <td>{{website.link}}</td> 
    </tr> 
    {{/each}} 
</table> 
<br /><br /> 
<input type="button" id="add-website" 
        value="More Websites" {{action 'add' }} /> 
<br /><br /> 
<input type="button" id="set-website" 
        value="Click Here" {{action 'set' }} /> 
{{outlet}}

输出：访问 localhost:4200/websites 查看输出

参考： https://api.emberjs.com/ember/4.6/classes/EmberArray/methods/



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注：本文由纯净天空筛选整理自aayushmohansinha大神的英文原创作品 Ember.js EmberArray setEach() Method。非经特殊声明，原始代码版权归原作者所有，本译文未经允许或授权，请勿转载或复制。