Laravel collection::ellipsis

laravel-ellipsis.php

<?php
// AppServiceProvider::boot()

/**
 * Returns a collection with max $limit entries. Other entries are grouped in the last item if needed.
 * 
 * @param int $limit
 * @param callable(Illuminate\Support\Collection): Mixed $lastCallback
 *
 * @return int
 */
Collection::macro('ellipsis', function (int $limit, callable $lastCallback) {
    // If collection not exceeding $limit, return it as-is
    if($this->count() <= $limit) {
        return $this;
    }
    // To show X element in final output, we need to take X-1 of original collection (Xth being the "others" entry)
    $limit--;
    $others = $this->skip($limit);
    return $this
        ->take($limit)
        ->push($lastCallback($others));
});
      
// Example usage
// (Will return 9 first projects, and a last "others" with the number of other projects)
$projects->sortByDesc('updated_at')->ellipsis(10, function($others) {
      return ['others' => $others->count()];
});