apl APL a Day #6: Indices and Encoding Previous sessions established a basic conception of indexing an array. Namely, an index encodes a reference to an element in an array according to the position of the element along each of its dimensions. Always a vector, each element of an index falls in
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