public function testMap()
{
// from js
$this->assertEquals(array(2, 4, 6), __u::map(array(1, 2, 3), function ($num) {
return $num * 2;
}), 'doubled numbers');
$ifnull = __u::map(null, function () {
});
$this->assertTrue(is_array($ifnull) && count($ifnull) === 0, 'handles a null property');
$multiplier = 3;
$func = function ($num) use($multiplier) {
return $num * $multiplier;
};
$tripled = __u::map(array(1, 2, 3), $func);
$this->assertEquals(array(3, 6, 9), $tripled);
$doubled = __u(array(1, 2, 3))->map(function ($num) {
return $num * 2;
});
$this->assertEquals(array(2, 4, 6), $doubled, 'OO-style doubled numbers');
$this->assertEquals(array(2, 4, 6), __u::map(array(1, 2, 3), function ($n) {
return $n * 2;
}));
$this->assertEquals(array(2, 4, 6), __u(array(1, 2, 3))->map(function ($n) {
return $n * 2;
}));
$doubled = __u::collect(array(1, 2, 3), function ($num) {
return $num * 2;
});
$this->assertEquals(array(2, 4, 6), $doubled, 'aliased as "collect"');
// docs
$this->assertEquals(array(3, 6, 9), __u::map(array(1, 2, 3), function ($num) {
return $num * 3;
}));
$this->assertEquals(array(3, 6, 9), __u::map(array('one' => 1, 'two' => 2, 'three' => 3), function ($num, $key) {
return $num * 3;
}));
}