<?php
function array_group($cond, $arr)
{
if (empty($arr)) return [];
$e = array_shift($arr);
$g = [$e];
while($cond($e, reset($arr)))
{
$g[] = array_shift($arr);
}
return array_merge([$g], array_group($cond, $arr));
}
function it($m,$p){echo ($p?'OK':'NO')." It $m\n";}
function eq($a,$b) {return $a==$b;}
echo it ('groups', array_group('eq', [1,5,5,6,6,6,7,9]) == [[1],[5,5],[6,6,6],[7],[9]]);
echo it ('groups by comparing with first item of each group', array_group(function ($a, $b) { return ($a == ($b-1)) || ($a==$b); }, [1,1,2,3,1]) == [[1,1,2],[3],[1]]);
echo it ('groups by comparing with first item of each group', array_group(function ($a, $b) { return ($a == ($b-1)) || ($a==$b); }, [1,1,2,1,3,1]) == [[1,1,2,1],[3],[1]]);
preferences:
90.44 ms | 402 KiB | 5 Q