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Embeer.js ArrayProxy isEvery()用法及代碼示例

Ember.js 是一個開源 JavaScript 框架，用於開發基於 Model-View-Controller (MVC) 架構的大型客戶端 Web 應用程序。 Ember.js是使用最廣泛的前端應用框架之一。它的目的是加速開發並提高生產力。目前，它被大量網站使用，包括 Square、Discourse、Groupon、Linked In、Live Nation、Twitch 和 Chipotle。

isEvery() 方法用於檢查數組中所有項目的屬性解析 true 的傳遞值。

用法:

isEvery( key, value );

參數：

  • key: 它是我們想要其值的屬性的名稱。
  • value: 它是針對鍵測試的屬性的值。

返回值：布爾值。

要運行以下示例，您需要有一個 ember 項目。要創建一個，您需要先安裝ember-cli。在終端中寫入以下代碼：

npm install ember-cli

現在您可以通過輸入以下代碼來創建項目：

ember new <project-name> --lang en

要啟動服務器，請鍵入：

ember serve

示例 1：鍵入以下代碼以生成本示例的路由：

ember generate route isEvery1

應用程序/路線/isEvery1.js


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); 
    } 
}

應用程序/控製器/isEvery1.js


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(); 
        } 
    }, 
});

應用程序/模板/isEvery1.hbs


{{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}}

輸出：訪問 localhost:4200/isEvery1 查看輸出

Ember.js ArrayProxy isEvery 方法

示例 2：鍵入以下代碼以生成本示例的路由：

ember generate route isEvery2

應用程序/路線/isEvery2.js


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: 'violer', 
        }, 
    ]; 
    model() { 
        return this.item1; 
    } 
    setupController(controller, model) { 
        super.setupController(controller, model); 
        controller.set('item1', this.item1); 
        controller.set('item2', this.item2); 
    } 
}

應用程序/控製器/isEvery2.js


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"); 
        }, 
    }, 
});

應用程序/模板/isEvery2.hbs


{{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}}

輸出：訪問 localhost:4200/isEvery2 查看輸出

Ember.js ArrayProxy isEvery 方法

參考：https://api.emberjs.com/ember/4.6/classes/ArrayProxy/methods/isEvery?anchor=isEvery



相關用法


注：本文由純淨天空篩選整理自satyam00so大神的英文原創作品 Ember.js ArrayProxy isEvery() Method。非經特殊聲明，原始代碼版權歸原作者所有，本譯文未經允許或授權，請勿轉載或複製。