PHP code example of zalas / collections

1. Go to this page and download the library: Download zalas/collections 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/ */

zalas / collections example snippets


interface Collection extends IteratorAggregate
{
    public function merge(Collection $other): Collection;

    public function filter(callable $f): Collection;

    public function map(callable $f): Collection;

    /**
     * @param mixed $initial
     * @param callable $f
     *
     * @return mixed
     */
    public function reduce($initial, callable $f);
}


use Zalas\Collection\LazyCollection;

$c = (new LazyCollection(new \ArrayIterator([1, 2, 3, 4])))
    ->filter(fn (int $e) => 0 === $e % 2)
    ->map(fn (int $e) => $e * 2)
;


use Zalas\Collection\LazyCollection;

$c = (new LazyCollection(new \ArrayIterator([1, 2, 3, 4)))
    ->filter(function (int $e) {
        return 0 === $e % 2;
    })
    ->map(function (int $e) {
        return $e * 2;
    })
;