Embeer.js EmberArray objectAt()用法及代码示例

import Route from '@ember/routing/route'; 
  
class student { 
    name = null; 
    gender = null; 
    class = null; 
    grade = null; 
    constructor(name, gender, class, grade) { 
        this.name = name; 
        this.gender = gender; 
        this.class = class; 
        this.grade = grade 
    } 
  
    show_grade() { 
        return `I am ${this.name} of  
        Class ${this.class} Get ${this.grade}`; 
  
    } 
} 
  
export default class StudentsRoute 
    extends Route { 
    students = 
        [new student('Aakash', 'M', 10, 'A',), 
        new student('Soniya', 'F', 8, 'C'), 
        new student('Esnoor', 'M', 9, 'C'), 
        new student('Isha', 'F', 11, 'B',), 
        new student('Doman', 'M', 12, 'B'), 
        new student('Lolu', 'M', 10, 'A'), 
        new student('Satyam', 'M', 10, 'A'), 
        ]; 
    temp2; 
    temp; 
    model() { 
        return this.students; 
    } 
    setupController(controller, model) { 
        super.setupController(controller, model); 
        controller.set('students', this.students); 
        controller.set('temp', this.temp); 
        controller.set('temp1', this.temp1); 
        controller.set('temp2', this.temp2); 
    } 
}

import Ember from 'ember'; 
import { mapBy } from '@ember/array'; 
  
export default Ember.Controller.extend({ 
    actions: { 
        removeDetails(start,end) { 
            this.students.removeAt(start,end); 
          }, 
          getDetail(index) { 
            let foo = this.students.objectAt(index); 
            alert(`${foo.name} of class ${foo.class}`); 
          }, 
  
    }, 
});

{{page-title "Student"}} 
<h3>List of Students: </h3> 
<br /><br /> 
<table> 
    <tr> 
        <th>Name</th> 
        <th>Gender </th> 
        <th>Class </th> 
        <th>Grade </th> 
    </tr> 
    {{#each @model as |detail|}} 
        <tr> 
            <td>{{detail.name}}</td> 
            <td> {{detail.gender}}</td> 
            <td>{{detail.class}}</td> 
            <td>{{detail.grade}}</td> 
        </tr> 
    {{/each}} 
</table> 
  
<br /> 
<br /><div> 
    <label>Enter Start Index: </label> 
    {{input value=this.start}} 
</div> 
<div> 
    <label>Enter End Index: </label> 
    {{input value=this.end}} 
</div> 
<div> 
    <input 
        type="button"
        id="remove-details"
        value="Remove Details"
        {{action "removeDetails"
         this.start this.end}} 
    /> 
</div> 
<br /><br /> 
<div> 
    <label>Enter Index: </label> 
    {{input value=this.idx}} 
</div> 
<div> 
    <input 
        type="button"
        id="get-detail"
        value="Get detail"
        {{action "getDetail" this.idx}} 
    /> 
</div> 
{{outlet}}

import Route from '@ember/routing/route'; 
import { } from '@ember/array'; 
  
export default class FruitsRoute 
    extends Route { 
    item1 = ['a', 'b', 'c', 'd', 'e', 'f', 'g'] 
    item2 = ['l', 'm', 'h', 'i', 'j', 'k']; 
    model() { 
        return this.item1; 
    } 
    setupController(controller, model) { 
        super.setupController(controller, model); 
        controller.set('item1', this.item1); 
        controller.set('item2', this.item2) 
    } 
}

import Ember from 'ember'; 
import { removeAt, unshiftObjects, objectAt, 
        uniqBy, find } from '@ember/array'; 
  
export default Ember.Controller.extend({ 
    actions: { 
        Show_item(start, end) { 
            let foo = this.item1.objectAt(start); 
            alert(foo); 
        }, 
        Push_item() { 
            this.item1.pushObjects(this.item2) 
        }, 
    }, 
}); 

{{page-title "Fruits"}} 
<table style=" border-spacing : 30px"> 
<h3>Here is a list 1: </h3> 
<ul> 
    {{#each @model as |item|}} 
    <li>{{item}}</li> 
    {{/each}} 
</ul> 
</table> 
<div> 
    <label>Enter Start Index: </label> 
    {{input value=this.start}} 
</div> 
<div> 
    <input type="button"
        id="show-details"
        value="Show Items"
        {{action 'Show_item' this.start}} /> 
</div> 
<br /><br /> 
<input type="button" id="push-item"
    value="Push More Items"
    {{action 'Push_item' }} /> 
  
  
{{outlet}}