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? ??? ?? PHP ???? 'array_map', 'array_walk' ? 'array_filter'? ?? ?? ???? ??? ?????

'array_map', 'array_walk' ? 'array_filter'? ?? ?? ???? ??? ?????

Nov 03, 2024 am 04:22 AM

How Do `array_map`, `array_walk`, and `array_filter` Differ in Their Array Manipulation Techniques?

??? ??: array_map, array_walk ? array_filter

array_map, array_walk ? array_filter? ?? ?? ??? ???? ??? ?? ??? ????.

array_map? ?? ?? ??? ?????. ??? ??? ?? ? ?? ??? ??? ??? ? ??? ?????. array_walk? ?? array_map? ?? ??? ?? ???? ?? ?????.

array_walk? ?? ??? ?? ???? ? ???? ????. ??? ???? ? ??? ?? ??? ???? ? ???? ?????. array_walk? ?? ??? ?? ????? array_map ??? ?????.

array_filter? ??? ??? ??? ???? ??? ????? ?????. ?? ??? ???? ??? ??? ??? ??? ? ??? ????. array_filter? array_map? ?? ?? ????? array_walk?? ?? ?? ??? ???? ????.

?:

<code class="php">$array = [2.4, 2.6, 3.5];

$mapResult = array_map('floor', $array); // Stays the same
print_r($mapResult); // [2, 2, 3]

array_walk($array, function (&amp;$v, $k) { $v = floor($v); }); // Alters the array
print_r($array);  // [2, 2, 3]

$filterResult = array_filter($array, function ($v) { return $v > 2.5; }); // Preserves keys
print_r($filterResult); // [2.6, 3.5]</code>

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