Laravel Collection Examples.

laravel_collections_examples.php

    public function average() {
        
        // Get The Average
        
        # Ex 1
        return (10 + 20 + 30) / 3;
        
        # Ex 2
        return collect([10, 20, 30])->average();

        # Ex 3
        $data = [10, 20, 30];

        return collect($data)->average();

        # Ex 4
        $data = [
            ['price' => 1000],
            ['price' => 2000],
            ['price'=> 3000]
        ];

        return collect($data)->average('price');

        # Ex 5
        return collect($data)->average(function($value) {
            if (! $value['active']) {
                return null;
            }
            return $value['price'] + $value['tax'];
        });
        
        # Ex 6
        $students = [
            ['name' => 'Javed', 'discount_fee' => 10400, 'tax' => 234, 'dropped' => false],
            ['name' => 'Kamran', 'discount_fee' => 83773, 'tax' => 544, 'dropped' => false],
            ['name' => 'Umar', 'discount_fee' => 10000, 'tax' => 234,  'dropped' => false],
        ];

        return collect($students)->average(function($value) {
            if (! $$value['dropped'])
                return null;
            
            return $value['dropped'] + $value['tax'];
        });

    }

    public function max() {
        
        $courses = [
            ['coruse'=>'php', 'fee'=>10000, 'discount' => 1000, 'active' => false],
            ['coruse'=>'react', 'fee'=>12000, 'discount' => 1100, 'active' => false],
            ['coruse'=>'nodejs', 'fee'=>15000, 'discount' => 1500, 'active' => true],
            ['coruse'=>'ai', 'fee'=>13000, 'discount' => 1200, 'active' => true],
        ];


        return collect($courses)->max(function($value) {
            if (! $value['active'])
                return null;

            return $value['fee'] - $value['discount'];
        });

    }

    public function min() {
        
        $courses = [
            ['coruse' => 'php', 'fee' => 10000, 'discount' => 1000, 'active' => false],
            ['coruse' => 'react', 'fee' => 12000, 'discount' => 1100, 'active' => true],
            ['coruse' => 'nodejs', 'fee '=> 15000, 'discount' => 1500, 'active' => true],
            ['coruse' => 'ai', 'fee' => 13000, 'discount' => 1200, 'active' => true],
        ];

        return collect($courses)->min(function($value) {
            if (! $value['active'])
                return null;

            return $value['discount'] + 1000 * 2;
        });
    }

    public function collapse() {
     
        $data = [
            [0, 1, 4, 4],
            [0,0,1,3, 5],
            ['a','b','c','d'],
            [
                0 => 50,
                1 => 30
            ],
            [4,6,3,1, 6],
            [9,4,5, 2],
        ];

        // return collect($data)->collapse();
        return collect($data)->collapse()->first();
     
    }

    public function chunk() {
     
        $collection = collect([1, 2, 3, 4, 5, 6, 7,8]);

        $chunks = $collection->chunk(4);

        return $chunks->all();

    }

    public function combine() {
     

        $keys = collect(['name','age']);

        $user = $keys->combine(['javed', 20]);

        return $user;

    }

    public function concat() {
     
       $data = ['key'=>'value1'];

       $appendData = ['key2'=>'value2','Value3','Value4'];

       return collect($data)->concat($appendData);

    }