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stelt/Generator

Created March 31, 2017 08:05
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Generator
<?php
function select($arr, $callback){
foreach ($arr as $value) {
if($callback($value))
yield $value;
}
}
$arr = [1, 2, 3, 4, 5, 6, 7, 8];
$select = select($arr, function($e){return $e % 2 == 0 ? true : false;});
$collect = collect($select, function($e){return $e * $e;});
foreach ($select as $val)
echo $val;
?>
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