Ember.js ArrayProxy every() Method

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);
    }
}

import Ember from 'ember';
import { every, addObjects } from '@ember/array';

export default Ember.Controller.extend({
    actions: {
        All_fruit() {
            let foo = this.item1.every((item) =>
              item.isFruit == true);
            alert(foo ? 'Yes all items are Fruit'
             : 'No All items not Fruit');
        },
        Any_Vegy() {
            let foo = this.item1.every((item) => 
            item.isFruit == false);
            alert(foo ? 'Yes all items are vegetable' 
            : 'No All items Not Vegetable');
        },
        AddItems() {
            this.item1.addObjects(this.item2);
        }

    },
});

{{page-title "Fruits"}}
<table style=" border-spacing : 30px">
    <h3>Here is a list 1: </h3>
    <ul>
        {{#each @model as |eatable|}}
            <li>{{eatable.name}}</li>
        {{/each}}
    </ul>
</table>
<input
    type="button"
    id="all-Fruit"
    value="All items are Fruit"
    {{action "All_fruit"}}
/>

<br /><br />
<input
    type="button"
    id="any-vegy"
    value="All item are Vegetables"
    {{action "Any_Vegy"}}
/>

<br /><br />
<input type="button" id="add-items"
  value="Add Items" {{action "AddItems"}} />

{{outlet}}

import Route from '@ember/routing/route';

class student {
    name = null;
    gender = null;
    clas = null;
    grade = null;
    constructor(name, gender, clas, grade) {
        this.name = name;
        this.gender = gender;
        this.clas = clas;
        this.grade = 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, every } from '@ember/array';

export default Ember.Controller.extend({
    actions: {
        Every_Pass() {
            let foo = this.students.every((person) =>
             person.grade != 'F')
            alert(foo ? "Yes Everyone Pass" :
             "No Everyone not Pass");
        },
        Every_Female() {
            let ans = this.students.mapBy('gender');
            let temp = ans.filter((gen) => 
             gen == 'F');
            alert(`Total girls in list is
             ${temp.length} `)
        },
        Every_male() {
            let ans = this.students.mapBy('gender');
            let temp = ans.filter((gen) =>
             gen == 'M');
            alert(`Total girls in list is
             ${temp.length} `)
        },
    },
});

{{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.clas}}</td>
            <td>{{detail.grade}}</td>
        </tr>
    {{/each}}
</table>

<br />
<br />
<div>
    <input
        type="button"
        id="check-pass"
        value="Is Every One Pass"
        {{action "Every_Pass"}}
    />
</div>
<br />
<div>
    <input
        type="button"
        id="check-female"
        value="Total Female Student"
        {{action "Every_Female"}}
    />
</div>
<br />
<div>
    <input
        type="button"
        id="check-male"
        value="Total Male Student"
        {{action "Every_male"}}
    />
</div>
{{outlet}}