Laravel 8 chunkWhile() {#collection-method}

chunkWhile 方法根据指定的回调值把集合分解成多个更小的集合：

$collection = collect(str_split('AABBCCCD'));

$chunks = $collection->chunkWhile(function ($current, $key, $chunk) {
    return $current === $chunk->last();
});

$chunks->all();

// [['A', 'A'], ['B', 'B'], ['C', 'C', 'C'], ['D']]