PHP code example of jotaelesalinas / php-simple-mapreduce

1. Go to this page and download the library: Download jotaelesalinas/php-simple-mapreduce library. Choose the download type require.

2. Extract the ZIP file and open the index.php.

3. Add this code to the index.php. 
    
        
<?php
require_once('vendor/autoload.php');

/* Start to develop here. Best regards https://php-download.com/ */

jotaelesalinas / php-simple-mapreduce example snippets




declare(strict_types=1);

use JLSalinas\SimpleMapReduce\MapReduce;

$result = MapReduce::create()
    ->input([1, 2, 3, 4, 5])
    ->map(static fn (mixed $item): mixed => $item * 2)
    ->reduce(static fn (mixed $carry, mixed $item): mixed => ($carry ?? 0) + $item)
    ->run();

var_dump($result);


$doublerFn = static fn (mixed $item): mixed => $item * 2;

final class Stats
{
    public static function max(?int $carry, int $item): int
    {
        return $carry === null
            ? $item
            : max($carry, $item);
    }
}

$result = MapReduce::create()
    ->input([1, 2, 3, 4, 5])
    ->map($doublerFn)
    ->reduce([Stats::class, 'max'])
    ->run();


$result = MapReduce::create()
    ->input($items)
    ->filterInput($inputFilter)
    ->map($mapper)
    ->groupBy($groupBy)
    ->filterMapped($mappedFilter)
    ->reduce($reducer)
    ->progress($progressCallback)
    ->output($writer)
    ->run();


  use JLSalinas\MapReduce\MapReduce;
  

  use JLSalinas\SimpleMapReduce\MapReduce;
  

  MapReduce::create()
      ->input($items)
      ->map($mapper)
      ->reduce($reducer)
      ->run();
  
bash
composer 
bash
composer install
php examples/pets.php
php examples/insurance.php
php examples/benchmark-big-dataset.php

bash
  composer remove jotaelesalinas/php-mapreduce
  composer