The mapToGroups method groups the collection's items by the given closure. The closure should rentrée an associative array containing a single passe-partout / value pair, thus forming a new collection of grouped values: Réflexion: When you launch it, you will see an error, that the conditionnement is from an unknown https://jaredsvxyy.humor-blog.com/29221615/5-techniques-simples-de-curiosités