Simple array: Difference between revisions

In the [[nested array model]], a simple array is an array whose elements are all [[simple scalars]]. A non-empty array is simple if and only if it has a [[depth]] of 1. [[Empty]] arrays are considered simple in most contexts, although they may have depth greater than 1 in languages that use the [[prototype]] to determine depth.

The simple arrays are a superset of the arrays allowed in [[flat array theory]] without [[Box|boxes]] (or those which have [[depth]] 0 in flat array theory): they include all arrays of a single type, as well as arrays which mix types like numbers and characters. Arrays which would not be representable in flat array theory—those which contain a mixture of simple scalar types, or contain both simple scalars and other arrays—are called [[mixed]].

The term "simple" is not typically used in flat APLs. On the APL Wiki, it may be used to mean a non-[[Box|boxed]] array.