/**
* @test
*/
public function map()
{
$inc = function ($x) {
return $x + 1;
};
$plus2 = function ($x) {
return $x + 2;
};
$y = F\map($inc);
$this->assertEquals($y([1, 2, 3, 4, 5, 6, 7, 8, 9]), [2, 3, 4, 5, 6, 7, 8, 9, 10]);
$this->assertEquals(F\map($plus2, [1, 2, 3, 4, 5, 6, 7, 8, 9]), [3, 4, 5, 6, 7, 8, 9, 10, 11]);
}
<?php
use Sergiors\Functional as F;
require_once __DIR__ . '/../vendor/autoload.php';
$join = F\pipe(F\flatten, F\partial('implode', ', '));
$mapCountry = F\map(function ($x) {
return $x['country'];
});
$countries = F\pipe($mapCountry, $join)->strtoupper();
// or `->pipe('strtoupper')`
$mapCity = F\map(function ($x) {
return $x['cities'];
});
$cities = F\pipe($mapCity)->pipe($join);
$xs = [['country' => 'Brazil', 'cities' => ['Florianópolis', 'Rio de Janeiro', 'Porto Alegre']], ['country' => 'USA', 'cities' => ['Baltimore', 'San Diego']], ['country' => 'China', 'cities' => ['Macau', 'Hong Kong']]];
assert('BRAZIL, USA, CHINA' === $countries($xs));
assert('Florianópolis, Rio de Janeiro, Porto Alegre, Baltimore, San Diego, Macau, Hong Kong' === $cities($xs));
