Basically creating an Eloquent Collection from the array of IDs (which will not have a model, made in this way, but just a list of IDs) and then pass the name of the relation (pluginCategories) to ...

The size or length count of an array in Java includes both null and non-null characters. Unlike the String and ArrayList, Java arrays do not have a size () or length () method, only a length property.

The Java array length property does not have round brackets after the field. The Java String length () method does. Confusion here will cause compile time errors, so be careful.

Arrays -- Declaring and initializing an array -- Using subscripts with an array -- Declaring an array of objects -- Searching an array for an exact match -- Searching an array for a range match -- ...

Here's how to make classes, fields, methods, constructors, and objects work together in your Java programs.

Along with a ton of other things, of course. Java introduced the concept of "single abstract method" types to do function pointer-like things. Lambdas can be used as SAM types instances.