当前位置: 首页>>代码示例 >>用法及示例精选 >>正文

Embeer.js EmberArray rejectBy()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。

rejectBy() 方法返回一个数组，其中包含给定键值为 false 的对象。

用法:

rejectBy(key,value)

参数：

  • key:要测试的属性。
  • value: 要检查的可选值。

返回值：新阵列。

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: "Patna", 
            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; 
    start; 
    end; 
    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); 
        controller.set("start", this.start); 
        controller.set("end", this.end); 
    } 
}

应用程序/控制器/details.js


import Ember from "ember"; 
import { any, slice, reverseObjects, rejectBy }  
    from "@ember/array"; 
  
export default Ember.Controller.extend({ 
    actions: { 
        checkCity(city) { 
            let res = this.details.any((person) => 
            person.city == city); 
            alert(`Present: ${res ? "YES" : "NO"}`); 
        }, 
        sliceItems(start, end) { 
            let tempItems = this.details.slice(start, end); 
            let str = ""; 
            for (let i = 0; i < tempItems.length; i++) 
                str += tempItems[i].name + "\n"; 
            alert(str); 
        }, 
        reverse() { 
            this.set("details", this.details.reverseObjects()); 
        }, 
        getFemale() { 
            let tempItems = this.details.rejectBy("gender", "M"); 
            let str = ""; 
            for (let i = 0; i < tempItems.length; i++) 
                str += tempItems[i].name + "\n"; 
            alert(str); 
        }, 
        pushMoreDetails() { 
            this.details.pushObjects(this.someMoreDetails); 
        }, 
    }, 
});

应用程序/模板/details.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/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 richest-people

应用程序/路线/richest-people.js


import Route from "@ember/routing/route"; 
import { sortBy } from "@ember/array"; 
  
export default class RichestPeopleRoute extends Route { 
    richestPeople = [ 
        { name: "mukesh ambani", netWorth: 90.7,  
          isFamily: false }, 
        { name: "jeff Bezos", netWorth: 148.1,  
          isFamily: false }, 
        { name: "Warren Buffet", netWorth: 99.3,  
          isFamily: false }, 
        { name: "Bill gates", netWorth: 104.7,  
          isFamily: false }, 
        { name: "elon Musk", netWorth: 253.4,  
          isFamily: false }, 
        { name: "gautam adani and family",  
          netWorth: 115.8, isFamily: true }, 
        { name: "Larry Page", netWorth: 93.4,  
          isFamily: false }, 
        { name: "larryEllison", netWorth: 103.3,  
          isFamily: false }, 
        { name: "sergeyBrin", netWorth: 89.9,  
          isFamily: false }, 
        { name: "bernard Arnault and family",  
          netWorth: 157.1, isFamily: true }, 
    ]; 
    firstPerson; 
    lastPerson; 
    idx = 5; 
    randomPerson; 
    num; 
    model() { 
        this.richestPeople =  
        this.richestPeople.sortBy("netWorth"); 
        this.randomPerson =  
        this.richestPeople[this.idx - 1]; 
        return this.richestPeople; 
    } 
    setupController(controller, model) { 
        super.setupController(controller, model); 
        controller.set("idx", this.idx); 
        controller.set("firstPerson", this.richestPeople.firstObject); 
        controller.set("lastPerson", this.richestPeople.lastObject); 
        controller.set("randomPerson", this.randomPerson); 
        controller.set("richestPeople", this.richestPeople); 
        controller.set("num", this.richestPeople.length); 
    } 
}

应用程序/控制器/richest-people.js


import Ember from "ember"; 
  
export default Ember.Controller.extend({ 
    actions: { 
        check(num) { 
            num = parseFloat(num); 
            let res = this.richestPeople.any((person) => 
            person.netWorth >= num); 
            alert(`${res ? "YES" : "NO"}`); 
        }, 
        getFamilyBusiness() { 
            let tempItems =  
            this.richestPeople.rejectBy("isFamily", false); 
            let str = ""; 
            for (let i = 0; i < tempItems.length; i++) 
                str += tempItems[i].name + "\n"; 
            alert(str); 
        }, 
    }, 
});

应用程序/模板/richest-people.hbs


{ { page - title "Richest People" } } 
<h2>Richest People in the World</h2> 
<table style="border: 2px solid black;padding: 30px;"> 
    <tr> 
        <th>Name</th> 
        <th>Net Worth (in billions $)</th> 
      </tr> 
      {{#each @model as |person|}} 
    <tr> 
        <td>{{person.name}}</td> 
          <td>{{person.netWorth}}</td> 
    </tr> 
      {{/each}} 
</table> 
<br /><br /> 
<div> 
    <label>Enter Value: </label> 
      {{input value=this.num}} 
</div> 
<div> 
    <input
        type="button"
        id="check"
        value="Contains Person With More Net Worth"
        {{action "check" this.num}} 
      /> 
</div> 
<br /><br /> 
<input
    type="button"
      id="get-family"
      value="Get Family Business"
      {{action "getFamilyBusiness"}} 
/> 
{{outlet}}

输出：访问 localhost:4200/richest-people 查看输出：

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



相关用法


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 rejectBy() 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。