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Embeer.js EmberArray getEach()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。

getEach()方法用于获取枚举中所有项目的命名属性的值。

用法:

getEach( key )

参数：

  • key：这是我们想要其值的属性的名称。

返回值：映射数组。

安装步骤：

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 getEach1

应用程序/路线/getEach1.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', 
        }, 
    ]; 
    city; 
    code; 
    model() { 
        return this.details; 
    } 
    setupController(controller, model) { 
        super.setupController(controller, model); 
        controller.set('details', this.details); 
        controller.set('city', this.city); 
        controller.set('code', this.code); 
    } 
}

应用程序/控制器/getEach1.js


import Ember from 'ember'; 
import { every } from '@ember/array'; 
  
export default Ember.Controller.extend({ 
    actions: { 
        allCity() { 
            let ans = this.details.getEach('city'); 
            alert(ans.join('\n')); 
        }, 
        allNames() { 
            let ans = this.details.getEach('name'); 
            alert(ans.join('\n')); 
        }, 
        allMobile() { 
            let ans = this.details.getEach('mobile'); 
            alert(ans.join('\n')); 
        }, 
        allZip() { 
            let ans = this.details.getEach('zipCode'); 
            alert(ans.join('\n')); 
        }, 
    }, 
});

应用程序/模板/getEach1.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> 
    <input type="button" id="get-name" 
        value="All Names" {{action "allNames"}} /> 
</div> 
<br /> 
<input 
    type="button"
      id="get-Mobile"
      value="All Mobile Number"
      {{action "allMobile"}} 
/> 
<br /><br /> 
<input type="button" id="get-city" 
    value="All City" {{action "allCity"}} /> 
<br /><br /> 
<input type="button" id="get-zip" 
    value="All Zip code" {{action "allZip"}} /> 
{{outlet}}

输出：访问localhost:4200/getEach1查看输出

Ember.js EmberArray getEach 方法

示例 2：键入以下代码以生成本示例的路由：

ember generate route getEach2

应用程序/路线/getEach2.js


import Route from '@ember/routing/route'; 
  
export default class StudentsRoute extends Route { 
    students = [ 
        { 
            name: 'Aakash', 
            gender: 'M', 
            subject: 'Math', 
            grade: 'A', 
        }, 
        { 
            name: 'Sita', 
            gender: 'F', 
            subject: 'Arts', 
            grade: 'A', 
        }, 
        { 
            name: 'Ram', 
            gender: 'M', 
            subject: 'Commerce', 
            grade: 'A', 
        }, 
        { 
            name: 'Esnoor', 
            gender: 'M', 
            subject: 'Math', 
            grade: 'C', 
        }, 
        { 
            name: 'Isha', 
            gender: 'F', 
            subject: 'Biology', 
            grade: 'B', 
        }, 
        { 
            name: 'Lolu', 
            gender: 'M', 
            subject: 'Commerce', 
            grade: 'A', 
        }, 
        { 
            name: 'Lucky', 
            gender: 'M', 
            subject: 'Biology', 
            grade: 'F', 
        }, 
        { 
            name: 'Balit', 
            gender: 'M', 
            subject: 'Math', 
            grade: 'F', 
        }, 
        { 
            name: 'Hillier Buchanan', 
            gender: 'M', 
            subject: 'Arts', 
            grade: 'A', 
        }, 
        { 
            name: 'Aman', 
            gender: 'M', 
            subject: 'Arts', 
            grade: 'B', 
        }, 
        { 
            name: 'Anuj', 
            gender: 'M', 
            subject: 'Math', 
            grade: 'F', 
        }, 
        { 
            name: 'Satyam', 
            gender: 'M', 
            subject: 'Math', 
            grade: 'F', 
        }, 
        { 
            name: 'Aayush', 
            gender: 'M', 
            subject: 'Math', 
            grade: 'C', 
        }, 
    ]; 
    temp2; 
    model() { 
        return this.students; 
    } 
    setupController(controller, model) { 
        super.setupController(controller, model); 
        controller.set('students', this.students); 
        controller.set('temp2', this.temp2); 
    } 
}

应用程序/控制器/getEach2.js


import Ember from 'ember'; 
  
export default Ember.Controller.extend({ 
    actions: { 
        allSubject() { 
            let temp = new Set(this.students.getEach 
                ('subject')); 
            alert([...temp].join('\n')); 
        }, 
        allName() { 
            let temp = this.students.getEach 
                ('name').join('\n'); 
            alert(temp); 
        }, 
        allClass() { 
            let temp = this.students.filterBy('class', 
                JSON.parse(this.temp2)); 
            let ans = ''; 
            for (let i = 0; i < temp.length; i++) 
                ans += temp[i].name + '\n'; 
            if (temp.length) { 
                alert(`Students from class ${this.temp2} 
                    are : \n${ans}`); 
            } else { 
                alert(`No student are from  
                    class ${this.temp2}`); 
            } 
        }, 
    }, 
});

应用程序/模板/getEach2.hbs


{{page-title "Students"}} 
<h3>Students of Class 12: </h3> 
<br /><br /> 
<table> 
    <tr> 
        <th>Name</th> 
        <th>Subject</th> 
        <th>Gender</th> 
        <th>Grade</th> 
      </tr> 
          {{#each @model as |student|}} 
    <tr> 
        <td>{{student.name}}</td> 
          <td>{{student.subject}}</td> 
          <td>{{student.gender}}</td> 
          <td>{{student.grade}}</td> 
    </tr> 
          {{/each}} 
</table> 
<br /> 
<input 
    type="button"
      id="all-pass"
      value="Student's Name"
      {{action "allName"}} 
/> 
<br /><br /> 
<input 
    type="button"
      id="all-Subject"
      value="All Subject"
      {{action "allSubject"}} 
/> 
{{outlet}}

输出：访问 localhost:4200/getEach2 查看输出

Ember.js EmberArray getEach 方法

参考： https://api.emberjs.com/ember/4.6/classes/EmberArray/methods/includes?anchor=includes



相关用法


注：本文由纯净天空筛选整理自jeemains0neet大神的英文原创作品 Ember.js EmberArray getEach() 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。