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Embeer.js Ember.NativeArray invoke()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。

invoke() 方法用于在接收器中实现该方法的每个对象上调用指定方法。

用法:

invoke( methodName, args );

参数:

  • methodName:它是方法的名称。
  • args: 它是调用时传递给方法的参数。

返回值:调用invoke的返回值。

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 invoke1

应用程序/路由/invoke1.js

Javascript


import Route from "@ember/routing/route";
class employee {
    name = null;
    mobile = null;
    city = null;
    country = null;
    gender = null;
    zipCode = null;
    constructor(name, mobile, city, country, gender, zipCode) {
        this.name = name;
        this.mobile = mobile;
        this.city = city;
        this.country = country;
        this.gender = gender;
        this.zipCode = zipCode;
    }
    get_add() {
        return `${this.name} is Employee from ${this.city}`;
    }
}
export default class DetailsRoute extends Route {
    details = [
        new employee("Anubhav", "1298119967", "Patna",
            "India", "M", "800020",),
        new employee("Yogesh", "1234567890","Raipur",
            "India","M","402001"),
        new employee("Satyam", "2222222222","Delhi",
            "India","M","110012"),
        new employee("Shivam","1122113322","Patna", 
            "India", "M", "530068"),
        new employee( "Ayushi", "2244668800","Jaipur",
            "India", "F", "302001")
    ];
     
    city;
    start;
    end;
    model() {
        return this.details;
    }
    setupController(controller, model) {
        super.setupController(controller, model);
        controller.set("details", this.details);
        controller.set("city", this.city);
        controller.set("start", this.start);
        controller.set("end", this.end);
    }
}

应用程序/控制器/invoke1.js

Javascript


import Ember from "ember";
import { isAny }
    from "@ember/array";
export default Ember.Controller.extend({
    actions: {
        getNames() {
            let ans = this.details.mapBy('name');
            alert(ans.join('\n'));
        },
        showAdd() {
            let res = this.details.invoke('get_add');
            alert(res.join('\n'));
        },
        checkFemale() {
            let res = this.details.isAny('gender', 'F');
            alert(res ? `Female employee present in List` 
                : `No Female present`);
        },
    },
});

应用程序/模板/invoke1.hbs

Javascript


{{page-title "invoke"}}
<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 />
<div>
    <input
        type="button"
        id="add-name"
        value="Show all address"
        {{action "showAdd"}}
      />
</div>
<br />
<div>
    <input
        type="button"
        id="check-female"
        value="Check Female"
        {{action "checkFemale"}}
      />
</div>
<br />
<input
    type="button"
      id="get-names"
      value="Get All names from list"
      {{action "getNames"}}
/>
{{outlet}}

输出:访问 localhost:4200/invoke1 查看输出

Ember.js Ember.NativeArray 调用方法

示例 2:键入以下代码以生成本示例的路由:

ember generate route invoke2

应用程序/路由/invoke2.js

Javascript


import Route from '@ember/routing/route';
import { } from '@ember/array';
class fruit {
    name = null;
    isFruit = null;
    color = null;
    constructor(name, isFruit, color) {
        this.name = name;
        this.isFruit = isFruit;
        this.color = color;
    }
    show_item() {
        return `${this.name} is ${this.isFruit ? '' : 'not'} fruit`;
    }
}
export default class FruitsRoute extends Route {
    fruits = [
        new fruit('Lady Finger', false, 'green'),
        new fruit('Brinjal', false, 'purple'),
        new fruit('Apple', true, 'red'),
        new fruit('Grapes', true, 'green'),
        new fruit('Mango', true, 'yellow'),
        new fruit('Watermelon', true, 'red'),
        new fruit('Orange', true, 'orange')
    ];
    model() {
        return this.fruits;
    }
    setupController(controller, model) {
        super.setupController(controller, model);
        controller.set('fruits', this.fruits);
    }
}

应用程序/控制器/invoke2.js

Javascript


import Ember from "ember";
import { isAny, isEvery } from "@ember/array";
export default Ember.Controller.extend({
    actions: {
        showFruit() {
            let ans = this.fruits.invoke("show_item")
            alert(ans.join('\n'));
        },
        alertFruit() {
            let ans = this.fruits.mapBy("name");
            alert(ans.join('\n'));
        },
        checkFruits() {
            let ans = this.fruits.isAny('isFruit', true);
            alert(ans ? "Fruits present in list" : 
                "Fruits not present in list")
        },
        checkvegy() {
            let ans = this.fruits.isAny('isFruit', false);
            alert(!ans ? "Vegetables present in list" : 
                "Vegetables not present in list")
        },
    },
});

应用程序/模板/invoke2.hbs

Javascript


{{page-title "invoke"}}
<h3>Here is a list of eatables: </h3>
<ul>
    {{#each @model as |eatable|}}
        <li>
              {{eatable.name}}
        </li>
      {{/each}}
</ul>
<br />
<input
    type="button"
      id="fruit-show"
      value="Check Fruits"
      {{action "showFruit"}}
/>
<br /><br />
<input
    type="button"
      id="fruit-all"
      value="Alert all Item names"
      {{action "alertFruit"}}
/>
<br /><br />
<input
    type="button"
      id="check-Fruits"
      value="Check any Fruit"
      {{action "checkFruits"}}
/>
<br /><br />
<input
    type="button"
      id="check-NonFruits"
      value="Check any Vegetables"
      {{action "checkvegy"}}
/>
{{outlet}}

输出:访问 localhost:4200/invoke2 查看输出。

Ember.js Ember.NativeArray 调用方法

参考: https://api.emberjs.com/ember/4.4/classes/Ember.NativeArray/methods/invoke?anchor=invoke



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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 Ember.NativeArray invoke() 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。