apl APL a Day #4: Arrays have elements An array that only describes a box which may contain elements, but that does not contain any elements, does not mean much. While shapes help to clarify the APL language, when doing any work, they really only describe how to arrange the elements of
apl APL a Day #3: Arrays have Shape Arrays arrange data into a certain rectangular shape. In APL, the shape of an array is a vector --- yes, in APL, shapes are also arrays --- that describes the number and size of layout in terms of dimensions. All arrays have a shape;