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Embeer.js Ember.NativeArray isEvery()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。

isEvery() 方法用于检查所有对象的特定键值是否相同。

用法:

isEvery( key, value );

参数：

  • key: 这是我们要检查的属性的名称。
  • value: 它是针对键进行测试的值。

返回值：布尔值。

安装和运行 Ember.js 的步骤：

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

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 isEvery1
  • 应用程序/路线/isEvery1.js

Javascript


import Route from '@ember/routing/route';
import { } from '@ember/array';
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'
        }
    ];
    model() {
        return this.fruits;
    }
    setupController(controller,model) {
        super.setupController(controller, model);
        controller.set('fruits', this.fruits);
    }
}
  • 应用程序/控制器/isEvery1.js

Javascript


import Ember from "ember";
import { isAny, isEvery } from "@ember/array";
export default Ember.Controller.extend({
    actions: {
        anyFruit() {
            let ans = this.fruits.isAny("isFruit")
            alert(ans ? `List contains SomeFruit` 
                : "List doesn't contains any Fruits");
        },
        allFruit() {
            let ans = this.fruits.isEvery("isFruit");
            alert(ans ? `List contains Only Fruits` 
                : "List doesn't contains Only Fruits");
        },
        remove() {
            this.fruits.clear();
        }
    },
});
  • 应用程序/模板/isEvery1.hbs

Javascript


{{page-title "isEvery"}}
<h3>Here is a list of eatables: </h3>
<ul>
    {{#each @model as |eatable|}}
    <li>
        {{eatable.name}}
    </li>
    {{/each}}
</ul>
<br /><br />
<input type="button" id="fruit-any"
    value="List Contains Any Fruit?"
    {{action 'anyFruit' }} />
<br /><br />
<input type="button" id="fruit-all"
    value="List Contains Only Fruit?"
    {{action 'allFruit' }} />
<br /><br />
<input type="button"
    id="remove-Fruits" value="Clear"
    {{action 'remove' }} />
{{outlet}}

输出：访问 localhost:4200/isEvery1 查看输出

Ember.js Ember.NativeArray isEvery 方法

示例 2：键入以下代码以生成本示例的路由：

ember generate route isEvery2
  • 应用程序/路线/isEvery2.js

Javascript


import Route from '@ember/routing/route';
import { } from '@ember/array';
export default class FruitsRoute extends Route {
    item1 = [
        {
            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 = [
        {
            name: 'Lady Finger',
            isFruit: false,
            color: 'green',
        },
        {
            name: 'Brinjal',
            isFruit: false,
            color: 'purple',
        },
        {
            name: 'Potato',
            isFruit: false,
            color: 'brown',
        },
        {
            name: 'Onion',
            isFruit: false,
            color: 'violet',
        },
    ];
    model() {
        return this.item1;
    }
    setupController(controller, model) {
        super.setupController(controller, model);
        controller.set('item1', this.item1);
        controller.set('item2', this.item2);
    }
}
  • 应用程序/控制器/isEvery2.js

Javascript


import Ember from 'ember';
import { isAny, isEvery, addObjects, findBy } 
    from '@ember/array';
export default Ember.Controller.extend({
    actions: {
        Find_item(data) {
            let foo = this.item1.findBy('name', data);
            alert(foo ? `${foo.name} present in list` 
                : 'No items not present in list');
        },
        AddItems() {
            this.item1.addObjects(this.item2);
        },
        anyFruit() {
            let ans = this.item1.isAny("isFruit")
            alert(ans ? `List contains SomeFruit` 
                : "List doesn't contains any Fruits");
        },
        allFruit() {
            let ans = this.item1.isEvery("isFruit");
            alert(ans ? `List contains Only Fruits` 
                : "List doesn't contains Only Fruits");
        },
    },
});
  • 应用程序/模板/isEvery2.hbs

Javascript


{{page-title "isEvery"}}
<h2>List of Item </h2>
<table >
    <tr>
        <th>Name</th>
        <th>Fruit</th>
        <th>Color</th>
    </tr>
    {{#each @model as |Eatable|}}
    <tr>
        <td>{{Eatable.name}}</td>
        <td>{{Eatable.isFruit}}</td>
        <td>{{Eatable.color}}</td>
    </tr>
    {{/each}}
</table>
<br/>
<div>
    <label>Enter value: </label>
    {{input value=this.temp}}
</div>
<input type="button"
    id="greet"
    value="Find Item"
    {{action 'Find_item' this.temp}} />
<br/><br/>
<br /><br />
<input type="button" id="add-items"
    value="Add Items"
    {{action 'AddItems' }} />
<br/><br/>
<input type="button"
    id="fruit-any"
    value="List Contains Any Fruit?"
    {{action 'anyFruit'}}/>
<br/><br/>
<input type="button"
    id="fruit-all"
    value="List Contains Only Fruit?"
    {{action 'allFruit'}}/>
{{outlet}}

输出：访问 localhost:4200/isEvery2 查看输出

Ember.js Ember.NativeArray isEvery 方法

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



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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 isEvery() 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。