Method demo

examples/demo.php:1508–1543

()

class ArrayFuncDemo
{
    public function demo(): void
    {
        $src = new ScaffoldingArrayFunc();

        $active = array_filter($src->members, fn(Pen $pen) => $pen->color() === 'blue');
        $active[0]->write();              // Pen preserved through array_filter

        $vals = array_values($src->members);
        $vals[0]->write();                // Pen preserved through array_values

        $pens = $src->roster();
        $last = array_pop($pens);
        $last->write();                   // single Pen from array_pop

        $cur = current($src->members);
        $cur->write();                    // Pen from current()

        end($src->members)->write();      // inline end() without variable

        foreach (array_filter($src->members, fn(Pen $pen) => true) as $pen) {
            $pen->color();                // Pen preserved in foreach
        }

        $mapped = array_map(fn($pen) => $pen, $src->members);
        $mapped[0]->write();              // Pen from array_map fallback

        // array_reduce: return type inferred from initial value (3rd arg)
        $merged = array_reduce($src->members, function(Pen $carry, Pen $item): Pen {
            return $carry;
        }, new Pen('merged'));
        $merged->write();                 // Pen from initial value argument

        // array_sum / array_product: always int|float
        $total = array_sum([10, 20, 30]);
        $product = array_product([2, 3, 4]);
    }
}