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Embeer.js ArrayProxy forEach()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。

forEach() 方法用于迭代数组并对数组的每个元素调用函数。

用法:

forEach(callback, target)

参数：

  • callback: 回调函数将调用数组的每个项目。
  • target: 它是回调函数将调用的目标值。

返回值：收件人。

Steps to Install and Run Ember.js:

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 forEach1

应用程序/路线/forEach1.js


import Route from '@ember/routing/route'; 
  
export default class FruitsRoute extends Route { 
    fruits = [ 
        { 
            'name': 'Lady Finger', 
            'isFruit': false, 
            'color': 'green'
        }, 
        { 
            'name': 'Brinjal', 
            'isFruit': false, 
            'color': 'purple'
        }, 
        { 
            'name': 'Apple', 
            'isFruit': true, 
            'color': 'red'
        }, 
        { 
            'name': 'Grapes', 
            'isFruit': true, 
            'color': 'green'
        }, 
        { 
            'name': 'Mango', 
            'isFruit': true, 
            'color': 'yellow'
        }, 
        { 
            'name': 'Watermelon', 
            'isFruit': true, 
            'color': 'red'
        }, 
        { 
            'name': 'Orange', 
            'isFruit': true, 
            'color': 'orange'
        } 
    ]; 
    item2; 
    item3; 
    hello(data) { 
        this.set('color', data); 
    } 
    init() { 
        this._super(...arguments); 
        this.fruits.addObserver('color', this, 'hello'); 
    } 
    model() { 
        this.init(); 
        return this.fruits; 
    } 
    setupController(controller, model) { 
        super.setupController(controller, model); 
        controller.set('fruits', this.fruits); 
        controller.set('item1', this.item1); 
        controller.set('item2', this.item2); 
        controller.set('item3', this.item3); 
    } 
}

应用程序/控制器/forEach1.js


import Ember from "ember"; 
import { addObject, isAny, isEvery } from "@ember/array"; 
  
export default Ember.Controller.extend({ 
    actions: { 
        print_Color() { 
            let temp = ''; 
            this.fruits.forEach((item) => temp +=  
            `${item.name} is ${item.color} color` + '\n'); 
            alert(temp ? temp : 'No item in list') 
        }, 
        remove() { 
            this.fruits.clear(); 
  
        }, 
    }, 
});

应用程序/模板/forEach1.hbs


{{page-title "Fruits"}} 
<h3>Here is a list of eatables: </h3> 
<table> 
    <tr> 
        <th>Name</th> 
        <th>Fruit</th> 
        <th>Color</th> 
    </tr> 
    {{#each @model as |detail|}} 
    <tr> 
        <td>{{detail.name}}</td> 
        <td>{{detail.isFruit}}</td> 
        <td>{{detail.color}}</td> 
    </tr> 
    {{/each}} 
</table> 
<br/><br/> 
<div> 
    <input type="button"
        id="addFruit"
        value="Find All the Colors of Fruit"
        {{action "print_Color"}}> 
</div> 
<br/> 
<div> 
    <input type="button"
        id="removeFruit"
        value="Clear"
        {{action "remove" }}> 
</div> 
{{outlet}}

输出：访问 localhost:4200/forEach1 查看输出：

Ember.js ArrayProxy forEach 方法

示例 2：键入以下代码以生成本示例的路由：

ember generate route forEach2

应用程序/路线/forEach2.js


import Route from '@ember/routing/route'; 
  
export default class DetailsRoute 
    extends Route { 
    details = [ 
        { 
            name: 'Aaksh', 
            mobile: '9811129967', 
            city: 'Delhi', 
            country: 'India', 
            gender: 'M', 
            zipCode: '800020', 
        }, 
        { 
            name: 'Sweta', 
            mobile: '9456712890', 
            city: 'Mumbai', 
            country: 'India', 
            gender: 'F', 
            zipCode: '400001', 
        }, 
        { 
            name: 'Satyam', 
            mobile: '2222222222', 
            city: 'Raipur', 
            country: 'India', 
            gender: 'M', 
            zipCode: '110012', 
        }, 
        { 
            name: 'Shandya', 
            mobile: '1122113322', 
            city: 'Bangalore', 
            country: 'India', 
            gender: 'F', 
            zipCode: '530068', 
        }, 
        { 
            name: 'Ayushi', 
            mobile: '2244668800', 
            city: 'Thana', 
            country: 'India', 
            gender: 'F', 
            zipCode: '302001', 
        }, 
        { 
            name: 'Yogesh', 
            mobile: '1133557799', 
            city: 'Chennai', 
            country: 'India', 
            gender: 'F', 
            zipCode: '600001', 
        }, 
        { 
            name: 'Sunny', 
            mobile: '9911000000', 
            city: 'Masore', 
            country: 'India', 
            gender: 'M', 
            zipCode: '574142', 
        }, 
        { 
            name: 'Khushi', 
            mobile: '8888888888', 
            city: 'Pune', 
            country: 'India', 
            gender: 'F', 
            zipCode: '111045', 
        }, 
    ]; 
    city; 
    model() { 
        return this.details; 
    } 
    setupController(controller, model) { 
        super.setupController(controller, model); 
        controller.set('details', this.details); 
        controller.set('someMoreDetails', this.someMoreDetails); 
        controller.set('city', this.city); 
    } 
}

应用程序/控制器/forEach2.js


import Ember from 'ember'; 
import { addObjects, reduce } 
    from '@ember/array'; 
  
export default Ember.Controller.extend({ 
    actions: { 
        show_Name() { 
            let temp = ''; 
            this.details.forEach((person)=>  
            temp += person.name + '\n'); 
            alert(temp); 
        }, 
        print_Female() { 
            let temp = ''; 
            this.details.forEach((person)=> person.gender ==  
            'F' ? temp += person.name + '\n' : temp); 
            alert(temp); 
        }, 
        hide_Number() { 
            this.details.forEach((person)=> Ember.set 
            (person, 'mobile', "**********")); 
              
        }, 
    }, 
});

应用程序/模板/forEach2.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="print-city" 
        value="Print All Name" 
        {{action 'show_Name'}} /> 
</div> 
<br /> 
<div> 
    <input type="button" id="print-female" 
        value="Print All Females" 
        {{action 'print_Female'}} /> 
</div> 
<br /> 
<div> 
    <input type="button" id="hide-number" 
        value="Hide All Phone number" 
        {{action 'hide_Number'}} /> 
</div> 
{{outlet}}

输出：访问 localhost:4200/forEach2 查看输出

Ember.js ArrayProxy forEach 方法

参考：https://api.emberjs.com/ember/4.6/classes/ArrayProxy/methods/forEach?anchor=forEach



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 ArrayProxy forEach() 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。