Random\Randomizer::pickArrayKeys
(PHP 8 >= 8.2.0)
Random\Randomizer::pickArrayKeys — Select random array keys
Açıklama
Uniformly selects num distinct array keys of the input array.
Each key of the input array is equally likely to be returned.
The selection of the array keys depends on the internal structure of the input
array. The returned array keys might be different for
two equal input arrays and two Random\Engines with
identical state, depending on how the input arrays have been created.
Bağımsız Değişkenler
-
array -
The array whose array keys are selected.
-
num -
The number of array keys to return; must be between
1and the number of elements inarray.
Dönen Değerler
An array containing num distinct array keys of array.
The returned array will be a list (array_is_list()). It will be a subset of the array returned by array_keys().
Hatalar/İstisnalar
-
If
numis less than1or greater than the number of elements inarray, a ValueError will be thrown. -
İlgili
Random\Randomizer::$enginemotorunun Random\Engine::generate() yöntemi tarafından yavrulanan Throwable nesneleri.
Örnekler
Örnek 1 Random\Randomizer::pickArrayKeys() example
<?php
$r = new \Random\Randomizer();
$fruits = [ 'red' => '🍎', 'green' => '🥝', 'yellow' => '🍌', 'pink' => '🍑', 'purple' => '🍇' ];
// Pick 2 random array keys:
echo "Keys: ", implode(', ', $r->pickArrayKeys($fruits, 2)), "\n";
// Pick another 3:
echo "Keys: ", implode(', ', $r->pickArrayKeys($fruits, 3)), "\n";
?>Yukarıdaki örnek şuna benzer bir çıktı üretir:
Keys: yellow, purple Keys: red, green, yellow
Örnek 2 Picking random values
<?php
$r = new \Random\Randomizer();
$fruits = [ 'red' => '🍎', 'green' => '🥝', 'yellow' => '🍌', 'pink' => '🍑', 'purple' => '🍇' ];
$keys = $r->pickArrayKeys($fruits, 2);
// Look up the values for the picked keys.
$selection = array_map(
static fn ($key) => $fruits[$key],
$keys
);
echo "Values: ", implode(', ', $selection), "\n";
?>Yukarıdaki örnek şuna benzer bir çıktı üretir:
Values: 🍎, 🍇
Ayrıca Bakınız
- array_keys() - Bir dizideki tüm anahtarları veya bir anahtar altkümesini döndürür
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